isIE = function(){
        return ( document.all && document.getElementById && !window.opera) ;
         //&& navigator.userAgent.toLowerCase().indexOf("mac") == -1
}
//window.alert(isIE ? "true":"false");

function returnObjById(id){
    if (document.getElementById){
        var returnVar = document.getElementById(id);        
    }else if(document.all){            
        var returnVar = document.all[id];        
    }else if(document.layers){
        var returnVar = document.layers[id];        
    }
    return returnVar;
}
        
startList = function() {               
		navRoot = returnObjById("nav").getElementsByTagName("LI");;                		
                for(var i = 0;i<navRoot.length;i++){
                        navRoot[i].onmouseover=function() {
                                this.className += " over";                                
                        }
                        navRoot[i].onmouseout=function() {
                                this.className = this.className.replace(new RegExp(" over\\b", ""));
                        }
                }                               
}