/***** Utility functions *****/
trackPortalHomepage();

Number.prototype.NaN0 = function()
{ 
	return isNaN(this) ? 0 : this;
}

function Utils()
{
}

Utils.getPosition = function(e)
{
	var root_offset_y = e.offsetTop;
	if (navigator.userAgent.indexOf('MSIE') != -1) 
	{
		e = e.offsetParent;
	}

	var left = 0;
	var top = 0;
	while (e.offsetParent)
	{
		left += e.offsetLeft + (e.currentStyle ? (parseInt(e.currentStyle.borderLeftWidth)).NaN0() : 0);
		top += e.offsetTop  + (e.currentStyle ? (parseInt(e.currentStyle.borderTopWidth)).NaN0() : 0);
		e = e.offsetParent;
	}

	left += e.offsetLeft + (e.currentStyle ? (parseInt(e.currentStyle.borderLeftWidth)).NaN0() : 0);
	top += e.offsetTop  + (e.currentStyle ? (parseInt(e.currentStyle.borderTopWidth)).NaN0() : 0);

	return { 
		x: left,
		y: top + (navigator.userAgent.indexOf('MSIE') != -1 ? root_offset_y : 0) 
	};
}

Utils.mouseCoords = function(ev)
{	
	if (!ev) 
	{
		var ev = window.event; 
	}

	if (ev.pageX || ev.pageY)
	{
		return {
			x: ev.pageX,
			y: ev.pageY
		};
	} 
	else if (ev.clientX || ev.clientY)
	{
		return {
			x: ev.clientX + document.body.scrollLeft + document.documentElement.scrollLeft,
			y: ev.clientY + document.body.scrollTop + document.documentElement.scrollTop
		};
	}
	else
	{
		return {
			x: 0,
			y: 0
		};
	}
}

Utils.getMouseOffset = function(target, ev)
{
	var docPos = getPosition(target);
	var mousePos = mouseCoords(ev ? ev : window.event);
	return {
		x: mousePos.x - docPos.x,
		y: mousePos.y - docPos.y
	};
}

Utils.getPageSize = function()
{
	var pageWidth = 0, pageHeight = 0;
	if (typeof( window.innerWidth ) == 'number')
	{
		//Non-IE
		pageWidth = window.innerWidth;
		pageHeight = window.innerHeight;
	}
	else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight))
	{
		//IE 6+ in 'standards compliant mode'
		pageWidth = document.documentElement.clientWidth;
		pageHeight = document.documentElement.clientHeight;
	}
	else if (document.body && (document.body.clientWidth || document.body.clientHeight))
	{
		//IE 4 compatible
		pageWidth = document.body.clientWidth;
		pageHeight = document.body.clientHeight;
	}

	return {
		x: pageWidth,
		y: pageHeight
	};
}

Utils.hitTest = function(element, x, y)
{
	var pos = Utils.getPosition(element);
	var ex  = pos.x;
	var ey  = pos.y;
	var ew  = elmt.offsetWidth;
	var eh  = elmt.offsetHeight;
	
	return (x >= ex && x <= ex + ew && y >= ey && y <= ey + eh) ? true : false;
}

Utils.horizontalHitTest = function(element, y)
{
	var pos = Utils.getPosition(element);
	var ey  = pos.y;
	var eh  = element.offsetHeight;
	
	return (y >= ey && y <= ey + eh) ? true : false;
}

Utils.addListener = function(event, method, use_capture)
{
	use_capture = use_capture ? use_capture : false;

	if (typeof window.addEventListener != 'undefined')
	{
		window.addEventListener(event, method, use_capture); // gecko, safari, konqueror and standard.
	}
	else if (typeof document.attachEvent != 'undefined')
	{
		document.attachEvent('on' + event, method); // IE
	}
	else
	{
		window['on' + event] = method;
	}
}

Utils.disableSelection = function(element) 
{
	element.onselectstart = function() 
	{
		return false;
	};
	//element.unselectable = 'on';
	element.style.MozUserSelect = 'none';
}

/***** Portal Events Handler *****/

function PortalEvents(){}

PortalEvents.listeners =
{
'onLoad'   :[],
'mouseMove':[],
'mouseDown':[],
'mouseUp'  :[]
};

PortalEvents.addListener = function (event,method,object)
{
	PortalEvents.listeners[event].push( {'method':method,'object':object} );
}

PortalEvents.onEvent = function (type,ev)
{
	ev = ev || window.event;

	var ls = PortalEvents.listeners[type];

	for (var i=0; i<ls.length; i++ )
	{
		var listener = ls[i];

		if ( typeof(listener['object']) == 'object' )
		{
			var target = listener['object'];
			target[listener['method']](ev);
		}
		else
		{
			listener['method'](ev);
		}
	}
}


// Install events
Utils.addListener('mousedown', function(ev) { PortalEvents.onEvent( 'mouseDown' , ev); }, false);
Utils.addListener('mouseup', function(ev) { PortalEvents.onEvent( 'mouseUp'   , ev); }, false);
Utils.addListener('mousemove', function(ev) { PortalEvents.onEvent( 'mouseMove' , ev);  }, false);

/***** Legacy functions *****/

function hide_overlay_elements(id)
{
	var element = document.getElementById(id)
	element.setAttribute('forced_hidden', 'true');
	element.style.visibility = 'hidden';
}

function show_overlay_elements(id)
{
	var element = document.getElementById(id)
	element.removeAttribute('forced_hidden');
	element.style.visibility = 'visible';
}

function hide_disruptive_overlay_elements()
{
	hide_elements_by_tag(['iframe', 'object', 'embed']);
}

function show_disruptive_overlay_elements()
{
	show_elements_by_tag(['iframe', 'object', 'embed']);
}

function hide_elements_by_tag(element_names)
{
	for (var h = 0; h < element_names.length; h++)
	{
		var elements = document.getElementsByTagName(element_names[h]);
		for (var j = 0; j < elements.length; j++)
		{
			if (elements[j].style.visibility != 'hidden')
			{
				elements[j].setAttribute('forced_hidden', 'true');
				elements[j].style.visibility = 'hidden';
			}
		}
	}
}

function show_elements_by_tag(element_names)
{
	for (var h = 0; h < element_names.length; h++)
	{
		var elements = document.getElementsByTagName(element_names[h]);
		for (var j = 0; j < elements.length; j++)
		{
			if (elements[j].getAttribute('forced_hidden') == 'true')
			{
				elements[j].removeAttribute('forced_hidden');
				elements[j].style.visibility = 'visible';
			}
		}
	}
}

function SYNACOR_findObj(n, d)
{
	var p, i, x;
	if (!d)
	{
		d = document;
	}
	if ((p = n.indexOf("?")) > 0 && parent.frames.length)
	{
		d = parent.frames[n.substring(p + 1)].document;
		n = n.substring(0, p);
	}
	if (!(x=d[n]) && d.all)
	{
		x = d.all[n];
	}
	for (i = 0; !x && i < d.forms.length; i++)
	{
		x = d.forms[i][n];
	}
	for (i = 0; !x && d.layers && id.layers.length; i++)
	{
		x = SYNACOR_findObj(n, d.layers[i].document);
	}
	if (!x && d.getElementById)
	{
		x = d.getElementById(n);
	}

	return x;
}

function find_pos_x(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
	{
		curleft += obj.x;
	}
	
	return curleft;
}

function find_pos_y(obj)
{
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
	{
		curtop += obj.y;
	}
	return curtop;
}

function SYNACOR_Snap() 
{
	var args = SYNACOR_Snap.arguments;
	var x = 0;
	var y = 0;

	for (offset = 0; offset < args.length; offset += 4)
	{
		var source_element = args[offset];
		var move_element = args[offset + 1];
		var dest_x = parseInt(args[offset + 2]);
		var dest_y = parseInt(args[offset + 3]);

		source_element = document.getElementById(source_element);
		move_element   = document.getElementById(move_element);
		if (!source_element || !move_element)
		{
			return;
		}

		x = find_pos_x(source_element);
		y = find_pos_y(source_element);

		try
		{
			move_element.style.left = (x + dest_x) + 'px';
			move_element.style.top  = (y + dest_y) + 'px';
		}
		catch (e)
		{
			try
			{
				move_element.offsetLeft = x + dest_x;
				move_element.offsetTop  = y + dest_y;
			}
			catch (e)
			{
			}
		}
	}
	return;
}


function SYNACOR_showHideLayers()
{ //v6.0
	var i, p, v, obj, vv, vd;
	var args = SYNACOR_showHideLayers.arguments;
	for (i = 0; i < (args.length-2); i += 3)
	{
		if ((obj = SYNACOR_findObj(args[i])) != null)
		{
			v = args[i + 2];
			if (obj.style)
			{
				obj = obj.style;
				vv  = (v == 'show') ? 'visible' : (v == 'hide') ? 'hidden' : v;
				vd  = (v == 'show') ? 'block'   : (v == 'hide') ? 'none'   : v;
			}
			obj.visibility=vv;
			obj.display=vd;
		}
	}
}

function getXMLRequestObject()
{
	var xmlhttp = false;
	// Special handling for IE.  Only IE parses this comment out and executes the code
	/*@cc_on @*/
	/*@if (@_jscript_version >= 5)
	// Funky coditional compilation to handle securty issues and ActiveX
	// Object version differences
	try 
	{
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch (e) 
	{
		try 
		{
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch (E) 
		{
			xmlhttp = false;
		}
	}
	@end @*/
	if (!xmlhttp && typeof XMLHttpRequest!='undefined')
	{
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}

function get_cdata(dom, tag)
{
	var tag = dom.getElementsByTagName(tag);
	if (!tag || tag.length < 1 || !tag[0].firstChild ||	!tag[0].firstChild.data)
	{
		return '';
	}
	return tag[0].firstChild.data;
}

function get_attribute(dom, tag, attribute)
{
	var tag = dom.getElementsByTagName(tag);
	if (!tag || tag.length < 1 || !tag[0].attributes ||
	     tag[0].attributes.length < 1 || !tag[0].attributes.getNamedItem(attribute))
	{
		return '';
	}
	
	return tag[0].attributes.getNamedItem(attribute).value;
}

function hide_id(id_to_hide)
{
	var what = document.getElementById(id_to_hide);
	if (what)
	{
		what.style.display='none';
	}
}

function base64encode(str)
{
	var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
	var out;
	var i;
	var len;
	var c1;
	var c2;
	var c3;
	var len = str.length;
	var i = 0;
	out = "";
	while (i < len)
	{
		c1 = str.charCodeAt(i++) & 0xff;
		if (i == len)
		{
			out += base64EncodeChars.charAt(c1 >> 2);
			out += base64EncodeChars.charAt((c1 & 0x3) << 4);
			out += "==";
			break;
		}
		c2 = str.charCodeAt(i++);
		if (i == len)
		{
			out += base64EncodeChars.charAt(c1 >> 2);
			out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
			out += base64EncodeChars.charAt((c2 & 0xF) << 2);
			out += "=";
			break;
		}
		c3 = str.charCodeAt(i++);
		out += base64EncodeChars.charAt(c1 >> 2);
		out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
		out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
		out += base64EncodeChars.charAt(c3 & 0x3F);
	}
	return out;
}

function trimStr(str)
{
	str = str.replace(/^\s*/, "");
	str = str.replace(/\s*$/, "");
	
	return str;
}

function add_event_listener(oRef, en, fn)
{
	obj = (typeof oRef == 'string')? document.getElementById(oRef) : oRef;
	if (window.addEventListener) 
	{
		obj.addEventListener(en, fn, false);
	}
	else if (window.attachEvent) 
	{
		obj.attachEvent('on'+en, fn);
	}
}

function remove_event_listener(oRef, en, fn)
{
	obj = (typeof oRef == 'string') ? document.getElementById(oRef) : oRef;
	if (window.addEventListener) 
	{
		obj.removeEventListener(en, fn, false);
	}
	else if (window.attachEvent) 
	{
		obj.detachEvent('on' + en, fn);
	}
}


function reg_repl_esc(text)
{
	return text.replace(/\$/g, '&#36;');
}


/**
 * Deprecated, do not use
 */
function openWindow(theURL, winName, features)
{
	window.open(theURL, winName, features);
}


function SYNACOR_swapImgRestore()
{ //v3.0
	var i, x;
	var a = document.SYNACOR_sr;
	for (i = 0; a && i < a.length && (x = a[i]) && x.oSrc; i++)
	{
		x.src = x.oSrc;
	}
}



function SYNACOR_swapImage() 
{ //v3.0
	var i, j = 0, x;
	var a = SYNACOR_swapImage.arguments;

	document.SYNACOR_sr = new Array;
	for (i = 0; i < (a.length - 2); i += 3)
	{
		if ((x = SYNACOR_findObj(a[i])) != null)
		{
			document.SYNACOR_sr[j++] = x;
			if (!x.oSrc)
			{
				x.oSrc = x.src;
			}
			x.src = a[i + 2];
		}
	}
}

function waterimg(arg) 
{
       window.location = arg;
}

function addLoadEvent(fn)
{
	if (window.addEventListener)
	{
		window.addEventListener('load', fn, false);
	}
	else if (window.attachEvent)
	{
		window.attachEvent('onload', fn);
	}
}

/**
 *  
 * Track customers whom have portal set to homepage in IE.
 * Note: This feature is only available for IE browsers. Mozilla browsers do not support the isHomePage, setHomePage methods.
 *
 * @package agdistis
 * 
 * 
 */
function trackPortalHomepage()
{
	if (navigator.userAgent.indexOf('MSIE') != -1)
	{	
		document.write("<input type=\"hidden\" id=\"hp\" style=\"display:none;behavior:url(#default#homepage);\" />");
		var input_footprint = document.getElementById('hp');
		
		// Parse URL
		var result, search_found = 'index.php';
		var search_fail = "fail";
		var current_portal_url = document.URL;
		
		// Determine if portal is of the format: [PORTAL_ROOT]/index.php or [PORTAL_ROOT]
		result = (current_portal_url.indexOf(search_found) != -1 ) ? current_portal_url.split(search_found)[0] : search_fail; 
			
		if(input_footprint.isHomePage(result) || input_footprint.isHomePage(current_portal_url))
		{
			// Write tracking image
			// If css style attribute 'display' is not set to none, the blank image will be displayed in IE.
			tracking_img = "<img style=\"float:left;\" width=\"1\" height=\"1\" src=\"../images/spacer_transparent.gif?hp=1\" alt=\"Spacer image\" />";
			document.write(tracking_img);
			
		}	
	}	
}