// ############################################################################
// ##
// ##  CUSTOM WEBSITE FUNCTIONS
// ##  (i.e. not standard white site functions)
// ##
// ############################################################################

// Put custom functions for your website here.

// ====================
// Function:    Flash Image Replacement
//
// Purpose:     Creates a flash image to replace text
//
// Input:       none
//
// Output:      
//
// Assumptions: 
//
// History:     20081220 JK Created
// ====================

function FlashImageReplacement() {
	
    if(typeof sIFR == "function") {
        //strSiteVirtualRoot = "";
        strFlashURL = strSiteVirtualRoot + "/App_Assets/Website/Flash/myriad.swf";
		sIFR();
		sIFR.replaceElement("h1", named({sFlashSrc: strFlashURL, sColor: "#ffffff", sBgColor: "#333333", nPaddingTop: "0", nPaddingRight: "0", nPaddingBottom: "0", nPaddingLeft: "0", sWmode: "transparent"}));
		sIFR.replaceElement("span.feature-heading", named({sFlashSrc: strFlashURL, sColor: "#ffffff", sBgColor: "#333333", nPaddingTop: "0", nPaddingRight: "0", nPaddingBottom: "0", nPaddingLeft: "0", sWmode: "transparent"}));
		};
}

// ====================
// Function:    CreateSecondaryHeight
//
// Purpose:     Sets the height of the Secondary container to be equal to Tertiary minus Primary.
//
// Input:       strPageObjects - Comma separated list of object IDs that should have their heights compared and readjusted.
//
// Output:      Updates the height of the Secondary container if the Tertiary is larger than Primary and Secondary combined..
//
// Assumptions: GetObjectHeight()
//
// History:     20071115 PW & JK Created
// ====================
function CreateSecondaryHeight() {

	if (document.getElementsByTagName('body')[0].id != 'homepage') {

		strPageObjects = "Primary,Secondary,Tertiary-Inner";
		var arrObjectHeight = new Array();
	
		if (strPageObjects) {
			arrPageObjects = strPageObjects.split(",");
		}
	
		if (arrPageObjects) {
			// Find the height of the tallest object.
			for (i = 0; i < arrPageObjects.length; i++) {
				arrObjectHeight[i] = GetObjectHeight(arrPageObjects[i]);
			}
		
			intContent =  arrObjectHeight[0] + arrObjectHeight[1];
			intMenu = arrObjectHeight[2];
		
			if (intContent < intMenu) {
				arrObjectHeight[1] = (arrObjectHeight[2] - arrObjectHeight[0]);
				document.getElementById(arrPageObjects[1]).style.height = arrObjectHeight[1] + 10 + "px";
			}
		}
	}
}

// ############################################################################
// ##
// ##  STANDARD WHITE SITE FUNCTIONS
// ##
// ############################################################################

// ####################################
// Navigation
// ####################################

// ====================
// Function:    NavPullDown
//
// Purpose:     Go to a URL that is selected from a form a pull-down form field
//
// Input:       strFormName - The ID of the form being used to select naviation
//              strFieldName - The ID of the field with URL select options
//
// Output:      Navigates to selected URL.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
// ====================
function NavFormSelect(strFormName,strFieldName) {
	intSelected = document[strFormName].elements[strFieldName].options.selectedIndex;
	strURL = document[strFormName].elements[strFieldName].options[intSelected].value;
	document[strFormName].elements[strFieldName].options.selectedIndex = 0;
	if (strURL != "") {
		location.href = strURL;
	}
}

// ====================
// Function:    InitNav
//              Note: InitNav must be called after menu list is created.
//
// Purpose:     Assigns classes to certain events for Internet Explorer 6.
//              (IE6 does not fully support CSS standards.)
//
// Input:       -
//
// Output:      -
//
// Assumptions: -
//
// History:     200512 Code from htmldog.com
//              200512 RW Turned into a function for nicer modularity
// ====================
function InitNav(strListID) {
	sfHover = function() {
		var sfEls = document.getElementById(strListID).getElementsByTagName("LI");
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=" sfhover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			}
		}
	}
	// Only executes in IE
	if (window.attachEvent) {
		window.attachEvent("onload", sfHover);
	}
}
	
	
// ####################################
// Windows & Alerts
// ####################################

// ====================
// Function:    Popup
//
// Purpose:     Open a popup window with a series of option settings.
//
// Input:       strPage - The URL of the page to open in the popup window.
//              intWidth - The window width in pixels 
//              intHeight - The window height in pixels
//              strID - The ID of the popup window. (This is important if the
//                window may be called on by other functions or if there are
//                multiple popup windows in a site.)
//              strScrollbars - Switch visible scrollbars on/off ("yes"/"no")
//              strLocation - Switch visible location bar on/off ("yes"/"no")
//              strToolbar - Switch visible toolbar on/off ("yes"/"no")
//              strStatus - Switch visible status bar on/off ("yes"/"no")
//              strResizable - Window is resizable or not ("yes"/"no")
//
// Output:      Window opens containing the specified URL.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
// ====================
function Popup(strPage,intWidth,intHeight,strID,strScrollbars,strLocation,strToolbar,strStatus,strResizable)
{
	if (!strPage) {
		strPage = "/";
	}
	if (!intWidth) {
		intWidth = 500;
	}
	if (!intHeight) {
		intHeight = 320;
	}
	if (!strID) {
		strID = "PopupWindow";
	}
	if (!strScrollbars) {
		strScrollbars = "yes";
	}
	if (!strLocation) {
		strLocation = "no";
	}
	if (!strToolbar) {
		strToolbar = "no";
	}
	if (!strStatus) {
		strStatus = "no";
	}
	if (!strResizable) {
		strResizable = "yes";
	}
	//if (isLoaded == 0)
	//{
	//	location.reload();
	//}
	idPopup = window.open(strPage,strID,"width="+intWidth+",height="+intHeight+",scrollbars="+strScrollbars+",location="+strLocation+",toolbar="+strToolbar+",status="+strStatus+",resizable="+strResizable);
	
	if (window.focus) {
		idPopup.focus();
	}
	return false;
}

// ====================
// Function:    PopdownLink
//
// Purpose:     Open a link in a popup window in a specified main window and
//              close the popup window. If the specified link window does not
//              exist it is created. If no window is specified the link is
//              targeted to the original opener of the popup window.
//
// Input:       strURL - The URL of the page to open
//              strWindowID - The ID of the window in which to open the link
//
// Output:      Navigates to selected URL in selected window and closes current
//              window.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
//              2004 Multiple window targets added. (Previously could only
//                   target the opener.)
// ====================
function PopdownLink(strURL,strWindowID) {
	if (!strWindowID) {
		top.opener.location.href = strURL;
    } else {
		if (strWindowID.location) {
			strWindowID.location.href = strURL;
	    } else {
			window.open(strURL,strWindowID);
	    }
    }
	top.close();
}

// ====================
// Function:    RequireKeywords
//
// Purpose:     Checks any search form to make sure keywords are entered before
//              the form can be submitted. 
//
// Input:       strFormName - The ID of the form with the keywords field in it
//              strFieldName - The ID of the keywords field within the form 
//
// Output:      Give an error if no keywords are presented.
//
// Assumptions: -
//
// History:     20040109 RW Created to replace local code in site templates.
// ====================
function RequireKeywords(strFormID,strFieldName) {
	if (document.forms[strFormID].elements[strFieldName].value.length <= 3) {
		alert("Please alter your requested keyword(s) in the search form.\nThe search phrase must be 3 characters or more in length.")
		return false;
	}
}

// ====================
// Function:    CS
//
// Purpose:     Display a "coming soon" message for sections of a website that
//              have not been created yet. This function is sometimes used in
//              development to make links active before a site is finished.
//
//              Note: This is an evil funciton, it should not be used! It
//              encourages bad development habits.
//
// Input:       -
//
// Output:      Show a "coming soon" message.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
// ====================
function CS() {
	alert("That function is coming soon.");
}

// ####################################
// Image Manipulation
// ####################################

// ====================
// Function:    ImageSwap
//
// Purpose:     Swap any image to another.
//
// Input:       strImageID - ID of the image being swapped
//              strNewImageSrc - Source of the new image being loaded
//
// Output:      Swaps images.
//
// Assumptions: Images with all specified IDs exist and are pre-loaded.
//
// History:     DDSN created back in the Distant Past
// ====================
function ImageSwap(strImageID,strNewImageSrc) {
	if (document.images) {
		document.images[strImageID].src = eval(strNewImageSrc+".src");
	}
}

// ====================
// Function:    ImageSwapFX
//
// Purpose:     Swap any image to another using an optional fade effect. Can
//              also be called with the transition effect disabled, i.e. just
//              swap the images.
//
// Input:       strImageID - ID of the image being swapped
//              strNewImageSrc - Source of the new image being loaded
//              blnDisableTrans - Switch the transition off or on (1/0)
//
// Output:      Swaps images with optional fade effect.
//
// Assumptions: - Images with all specified IDs exist and are pre-loaded.
//              - Requires fading transition style to be set first on image tag
//              - Only works for IE5.5+ but falls back nicely
//              - Javascript Globals: blnToggleTrans
//
// History:     2003 DDSN Created
//              2004 Updated with more standard naming structures
// ====================
function ImageSwapFX(strImageID,strNewImageSrc,blnDisableTrans) {
	if (blnDisableTrans || !document.images[strImageID].filters || blnIE50) {
		if (document.images) {
			document.images[strImageID].src = eval(strNewImageSrc+".src");
		}
	} else {
		// After setting Apply, changes to the object are not displayed
		// until Play is called.
		document.images[strImageID].filters[0].Apply();

		if (blnToggleTrans) {
			blnToggleTrans = 0;
			document.images[strImageID].src = eval(strNewImageSrc+".src");
		} else {
			blnToggleTrans = 1;
			document.images[strImageID].src = eval(strNewImageSrc+".src");
		}
		document.images[strImageID].filters[0].Play();
	}
}

// ####################################
// Form Handling
// ####################################

function SetDefaultFieldValue(strForm,strElement,strValue,blnFocus) {

	var strSubscribeValue = document.forms[strForm].elements[strElement].value;

	if ( blnFocus ) {
		if ( strSubscribeValue == strValue ) {
			document.forms[strForm].elements[strElement].value = "";
		}
	} else {
		if ( strSubscribeValue == "" ) {
			document.forms[strForm].elements[strElement].value = strValue;
		}
	}

}

// ####################################
// DOM/div Manipulation
// ####################################

// ====================
// Function:    getObj
//
// Purpose:     Returns string for access to passed in object style attributes
//
// Input:       ID of object
//
// Output:      Returns string for access to passed in object style attributes
//
// Assumptions: -
//
// History:     SC 2006-05-15
function getObj(name) {
	if (document.getElementById) {
		this.obj = document.getElementById(name);
		this.style = document.getElementById(name).style;
	} else if (document.all) {
		this.obj = document.all[name];
		this.style = document.all[name].style;
	} else if (document.layers) {
		this.obj = document.layers[name];
		this.style = document.layers[name];
	}
}


// ====================
// Function:    GetObjectHeight
//
// Purpose:     Returns the height of any passed in block level object
//
// Input:       ID of item
//
// Output:      Returns the height of any passed in block level object
//
// Assumptions: -
//
// History:     SC 2006-05-15
// ====================
function GetObjectHeight(objectRef) {
	var intHeight = -1;

	if (document.getElementById) {
		if (document.getElementById(objectRef)) {
			intHeight = eval(document.getElementById(objectRef).offsetHeight);
		}
	} else if (document.all) {
		if (document.all[objectRef]) {
			intHeight = document.all[objectRef].scrollHeight;
		}
	} else if (document.layers) {
		if (document[objectRef]) {
			intHeight = document[objectRef].clip.bottom;
		}
	}

	return intHeight;
}

// ====================
// Function:    SetUniformHeight
//
// Purpose:     Sets a number of page objects to a uniform height, being the
//              maximum height of any of the given objects.
//
// Input:       strPageObjects - Comma separated list of object IDs that should
//              be set to a uniform height.
//
// Output:      Updates the height of the given objects.
//
// Assumptions: GetObjectHeight()
//
// History:     20060823 RW Created
// ====================
function SetUniformHeight(strPageObjects) {
	intMaxHeight = 0;

	if (strPageObjects) {
		arrPageObjects = strPageObjects.split(",");
	}

	if (arrPageObjects) {
		// Find the height of the tallest object.
		for (i = 0; i < arrPageObjects.length; i++) {
			intThisHeight = GetObjectHeight(arrPageObjects[i]);
			if (intThisHeight > intMaxHeight) {
				intMaxHeight = intThisHeight;
			}
		}

		// Set all the objects to the same (maximum) height if a height larger
		// than 0 was found.
		if (intMaxHeight > 0 ) {
			for (i = 0; i < arrPageObjects.length; i++) {
				//if (blnIE)  {
				//	strMaxHeight = intMaxHeight;
				//} else {
					strMaxHeight = intMaxHeight + 'px';
				//}
				if(document.getElementById(arrPageObjects[i])) {
					document.getElementById(arrPageObjects[i]).style.height = strMaxHeight;
				}
			}
		}
	}
}

// ====================
// Function:    fixActivexClick
//
// Purpose:     Stops the active content "click to activate" annoyance for IE7.
//
// Input:       -
//
// Output:      Removes the "click to activate" from <object> tags in IE.
//
// Assumptions: -
//
// History:     -
// ====================
// Active Content "first click" fix for IE
function fixActivexClick() {
	objectTags = document.getElementsByTagName("object");
	for (var i = 0; i < objectTags.length; i++) {
			objectTags[i].outerHTML = objectTags[i].outerHTML;
	}
}

// ####################################
// Printing
// ####################################

// ====================
// Function:    LoadVBPrinter
//
// Purpose:     Load Visual Basic printing commands for VB enabled browsers.
//
// Input:       -
//
// Output:      Loads (writes out) visual basic printing functions.
//
// Assumptions: Javascript Globals: blnIE, blnCanPrint, blnMac
//
// History:     DDSN created back in the Distant Past
// ====================
function LoadVBPrinter() {
	if (blnIE && !blnCanPrint && !blnMac) with (document) {
		writeln('<OBJECT ID="WB" WIDTH="0" HEIGHT="0" CLASSID="clsid:8856F961-340A-11D0-A96B-00C04FD705A2"></OBJECT>');
		writeln('<' + 'SCRIPT LANGUAGE="VBScript">');
		writeln('Sub window_onunload');
		writeln('    On Error Resume Next');
		writeln('    Set WB = nothing');
		writeln('End Sub');
		writeln('Sub vbPrintPage');
		writeln('    OLECMDID_PRINT = 6');
		writeln('    OLECMDEXECOPT_DONTPROMPTUSER = 2');
		writeln('    OLECMDEXECOPT_PROMPTUSER = 1');
		writeln('    On Error Resume Next');
		writeln('    WB.ExecWB OLECMDID_PRINT, OLECMDEXECOPT_DONTPROMPTUSER');
		writeln('End Sub');
		writeln('<' + '/SCRIPT>');
	}
}

// ====================
// Function:    PrintPage
//
// Purpose:     Opens the print dialog window or shows a fallback message for
//              unsupported browsers
//
// Input:       -
//
// Output:      Opens the print dialog window or shows a fallback message for
//              unsupported browsers.
//
// Assumptions: Javascript Globals: blnCanPrint, blnIE, blnMac
//
// History:     DDSN created back in the Distant Past
// ====================
function PrintPage() {
	if (blnCanPrint) {
		window.print();
	} else if (blnIE && !blnMac) {
		vbPrintPage();
	} else {
		alert("Your web browser does not appear to support the automatic\nPrint function. To print this page, please select the \"Print\"\noption from the \"File\" menu of your web browser.");
	}
}


// Load Visual Basic printing commands for VB enabled browsers
//LoadVBPrinter()

// ####################################
// ASP.Net Enhancements & Hacks
// ####################################

// The following functions are loaded by ASP.Net in WebResource.axd when a
// server side form is used, but WebResource.axd is not loaded until the 
// last element of the page! So if an event fires on the page (like a 
// keypress on a form element) that requires one of these functions, a 
// Javascript error will be generated. Quite silly! Defining these functions
// in our global file (loaded in the header) as blank functions at least
// means that the same behaviour will happen for these events as happens when
// Javascript is turned off completely, rather than an ugly error.
function WebForm_FireDefaultButton(event, target) {
}

// List other relevant functions here (based on site testing)...
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}
Function.prototype.nextMethod = function(m) {
	var f = this;
	return function() {f(); m();}
};
function CallbackManager() {
	this.invokeCallbacks = function() { };
	this.registerCallback = function(m) {
		this.invokeCallbacks = (this.invokeCallbacks).nextMethod(m);
	}
}
var onloadManager = new CallbackManager();
function Body_OnLoad() {
	if (window.on_load && (typeof window.on_load == "function")) onloadManager.registerCallback(window.on_load);
	onloadManager.invokeCallbacks();
}
function GoSplashPage() {
	eraseCookie("visitorhomepage");
	location.href = "http://www.earthwatch.org/default.aspx?splash=1";
}
var maxZIndex = 10;
function setTopmost(id) {document.getElementById(id).style.zIndex = (maxZIndex++);}

function ReturnKeyCheck(source, e) {
	var characterCode; // literal character code will be stored in this variable

	if (e && e.which){ //if which property of event object is supported (NN4)
		characterCode = e.which; //character code is contained in NN4's which property
	}else{
		characterCode = e.keyCode; //character code is contained in IE's keyCode property
	}

	return (characterCode == 13);
}
function Input_OnKeyPress(source, e, target) {
	if (ReturnKeyCheck(source, e)) {
		var t = document.getElementById(target);
		if (t.nodeName == "A") { eval(t.href); }
		else {
			if (t.dispatchEvent) {
				var evt = document.createEvent("MouseEvents");
				evt.initMouseEvent("click", true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
				t.dispatchEvent(evt);
			}
			else { t.click(); }
		}
		return false;
	}
	return true;
}

var onLoadItems = new Array();
function attachOnLoadScript(scriptname) {
	onLoadItems[onLoadItems.length] = scriptname;
}

function processLoadItems() {
	for (var i = 0; i < onLoadItems.length; i++) {
		errorCode = window[onLoadItems[i]]();
	}
}
if (window.addEventListener) {
	window.addEventListener("load", processLoadItems, false);
} else if (window.attachEvent) {
	window.attachEvent("onload", processLoadItems);
} else {
	window.onload = function() { processLoadItems(); }
}

function normalise_ccnumber(elem) {
	elem.value = elem.value.replace(/\s/g, '');
	elem.value = elem.value.replace(/\-/g, '');
}