var e = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion.charAt(0)) >= 4) ? true : false;

var news_off = new Image();
var news_on = new Image();
var classmates_off = new Image();
var classmates_on = new Image();
var event_off = new Image();
var event_on = new Image();
var forum_off = new Image();
var forum_on = new Image();
var help_off = new Image();
var help_on = new Image();

news_off.src = "images/news_off.gif";
news_on.src = "images/news_on.gif";
classmates_off.src = "images/classmates_off.gif";
classmates_on.src = "images/classmates_on.gif";
event_off.src = "images/event_off.gif";
event_on.src = "images/event_on.gif";
forum_off.src = "images/forum_off.gif";
forum_on.src = "images/forum_on.gif";
help_off.src = "images/help_off.gif";
help_on.src = "images/help_on.gif";

function iOver(oAnchor) {
	if(e){
		thisImg = oAnchor.children.tags('IMG')[0];
		thisImg.src = eval(thisImg.name + "_on").src;
	}
}

function iOut(oAnchor) {
	if(e){
		thisImg = oAnchor.children.tags('IMG')[0];
		thisImg.src = eval(thisImg.name + "_off").src;
	}
}