//window.onload = init;

function init(){
var current_browser = navigator.appName;
if(current_browser.indexOf('Microsoft') > -1){
	attachNavEvents();
}else{
	//do nothing
}
}

//second level attach event only
function attachNavEvents(){
	var navigation = document.getElementById('leftnav');
	var children1 = navigation.childNodes;
	for(var i = 0; i < children1.length; i++){
		if(children1[i].tagName != 'LI'){ continue; }
		var children2 = children1[i].getElementsByTagName('UL')[0].childNodes;
		if(children2.length > 0){
			for(var j = 0; j < children2.length; j++){
				if(children2[j].tagName != 'LI'){ continue; }
				children2[j].onmouseover = function(){
					this.className = 'over';
				}
				children2[j].onmouseout = function(){
					this.className = this.className.replace('over', '');
				}
			}
		}
	}
}