<!--
var images = new Array();
 
function preloadImages(){
    for (i=0; i < preloadImages.arguments.length; i++){
         images[i] = new Image();
        images[i].src = preloadImages.arguments[i];
    }
}
 
preloadImages("econ2_101.jpg", "econ2_1011.jpg", "arrow_over.gif");

stuHover = function() {
	var cssRule;
	var newSelector;
	for (var i = 0; i < document.styleSheets.length; i++)
		for (var x = 0; x < document.styleSheets[i].rules.length ; x++)
			{
			cssRule = document.styleSheets[i].rules[x];
			if (cssRule.selectorText.indexOf("LI:hover") >= 0)
			{
				 newSelector = cssRule.selectorText.replace(/LI:hover/gi, "LI.iehover");
				document.styleSheets[i].addRule(newSelector , cssRule.style.cssText);
			}
		}
	var getElm = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<getElm.length; i++) {
		getElm[i].onmouseover=function() {
			this.className+=" iehover";
		}
		getElm[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" iehover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", stuHover);


	// Returns the closest parent tag with tagName containing
	// the src tag. If no such tag is found - null is returned.
	function checkParent( src, tagName ) {
		while ( src != null ) {
			if (src.tagName == tagName)
				return src;
			src = src.parentElement;
		}
		return null;
	}

	// Returns the first tag with tagName contained by
	// the src tag. If no such tag is found - null is returned.
	function checkContent( src, tagName ) {
		var pos = src.sourceIndex ;
		while ( src.contains( document.all[++pos] ) )
			if ( document.all[pos].tagName == tagName )
				return document.all[pos] ;
		return null ;
	}

	// Handle onClick event in the outline box
	function outlineAction() {
		var src = event.srcElement ;
		var item = checkParent( src, "LI" ) ;
		if ( parent != null ) {
			var content = checkContent( item, "UL" ) ;
			if ( content != null )
				if ( content.style.display == "" )
					content.style.display = "block" ;
				else
					content.style.display = "" ;
		}
		event.cancelBubble = true;
	}


function high(which2){
theobject=which2;
highlighting=setInterval("highlightit(theobject)",50);
}
function low(which2){
clearInterval(highlighting);
which2.filters.alpha.opacity=20;
}

function highlightit(cur2){
if (cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=5;
else if (window.highlighting)
clearInterval(highlighting);
}
// -->