/*
function getElementsByClass(searchClass,node,tag) 
{
  var classElements = new Array();
  if (node == null)
    node = document;
  if (tag == null)
    tag = '*';
  var els = node.getElementsByTagName(tag);
  var elsLen = els.length;
  var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
  for (i = 0, j = 0; i < elsLen; i++) {
    if (pattern.test(els[i].className) ) {
      classElements[j] = els[i];
      j++;
    }
  }
  return classElements;
}

    var browser=navigator.appName;
    
    if(browser=="Microsoft Internet Explorer")
    {
      var elems = getElementsByClass("homeimage");
      for(i=0;i<elems.length;i++)
      {
        elems[i].style.left="3px";
      }
    }
    else if(browser=="Netscape")
    {
         var elems = getElementsByClass("homeimage");
      for(i=0;i<elems.length;i++)
      {
        elems[i].style.left="4px";
      }
    }
*/
///////////////////////////////////////////////////////
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();

//alert(BrowserDetect.browser+ " " + BrowserDetect.OS )
//////////////////////////////////////////
var sources = ["/portals/0/images/illumination.gif", "/portals/0/images/pinkday.gif"]
//var ct = 0;
var img1 = document.getElementById("ssImage1");
var img2 = document.getElementById("ssImage2");
var img;
var opacity = 0;
var isFirefox = (BrowserDetect.browser.indexOf("Firefox")==0);
var isExplorer = (BrowserDetect.browser.indexOf("Explorer")==0);
var imageIndex = 1;
//document.getElementById("ssImage2").style["filter"]="alpha(opacity=" + 100 + ")";


setTimeout("fadeImage()",5000);


function switchImage() 
{
	opacity = 0;
	document.getElementById("ssImage1").src = document.getElementById("ssImage2").src;
	setOpacity2(0);	
	imageIndex++;
	if(imageIndex >= sources.length)
	{
		imageIndex = 0;
	}
	document.getElementById("ssImage2").src = sources[imageIndex];
	//alert(sources[imageIndex]);
	setTimeout("fadeImage()",5000);
}

function setOpacity2(o)
{
	if(isFirefox == true)
	{
		document.getElementById("ssImage2").style.opacity = o/100;		
	}
	if(isExplorer == true)
	{
		document.getElementById("ssImage2").style.filter ="alpha(opacity=" + o.toString() + ")";	
	}
	else
	{
		document.getElementById("ssImage2").style.opacity = o/100;		
	}
}

function fadeImage()
{
	opacity = opacity+10;
	setOpacity2(opacity);	
	if(opacity != 100)
	{
		setTimeout("fadeImage()",50);
	}
	else
	{
		switchImage();
	}
}