var is_ie=(document.all)?true:false;
var menu_init_occured=false;
var is_ie5=(navigator.appVersion.indexOf("MSIE 5")>-1);
var dom_support=(document.getElementById && document.createTextNode)?true:false;

function addEvent(obj,evType,fn,useCapture){
	var ret=false;
	if(obj!=null){
		if(obj.addEventListener){
			obj.addEventListener(evType,fn,useCapture);
			ret=true;
		}
		else if(obj.attachEvent){
			obj.attachEvent("on"+evType,fn);ret=true;
		}
	}
	return ret;
}
function getElement(parent,id){
	var ret=null;
	if(parent!=null)
		ret=parent.getElementById(id);
	return ret;
}
function getTags(parent,tag){
	var ret=null;
	if(parent!=null)
		ret=parent.getElementsByTagName(tag);
	return ret;
}
function setTxt(elem,txt){
	if(elem!=null) 
		elem.innerHTML=txt;
}
function setClass(elem,nm){
	if(elem!=null)
		elem.className=nm;
}
function setValue(elem,val){
	if(elem!=null)
		elem.value=val;
}
function getValue(elem){
	var ret='';
	if(elem!=null)
		ret=elem.value;
	return ret;
}
function getSelectedIndex(elem){
	var indx=-1;
	if(elem!=null)
		indx=elem.selectedIndex;return indx;
}