// FIX DO PSEUDO-SELETOR ":hover" DO IE6
var startList = function() {
	if (navigator.userAgent.toLowerCase().indexOf('msie 6') != -1) {
		navRoot = $CLASS('nav_bar')[0].getElementsByTagName('LI');
		for (i=0; i<navRoot.length; i++) {
			node = navRoot[i];
			node.onmouseover=function() {
				this.className+=" overr";
			}
		node.onmouseout=function() {
			this.className=this.className.replace(" overr", "");
			}
		}
	}
}

if(window.attachEvent)window.attachEvent("onload", startList);