function $id(){
	var elements = new Array();
	for (var i = 0; i < arguments.length; i++){
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	 } 
		return elements;
}
function popupTips(obj){
	 var popupDiv = $id(obj);
		 popupDiv.className = "popupdiv";
		 popupDiv.style.marginLeft = "-" + popupDiv.clientWidth/2 + "px";
		 popupBg = document.createElement("div");
		 popupBg.setAttribute("id","popupbg");
		 pHeight = popupDiv.clientHeight;
		 bHeight = document.body.clientHeight;
	 if(pHeight>bHeight){
		 popupBg.style.height = pHeight+300+"px";
		 popupDiv.style.marginTop = "-400px";
	 }else{
		 popupBg.style.height = bHeight+"px";
		 popupDiv.style.marginTop  = "-" + popupDiv.clientHeight/2 + "px";
	 }
	 document.body.appendChild(popupBg);
	 hiddenSelect();
}
function closeDiv(obj){
	popupBg.className = "hidden";
	$id(obj).className = "hidden";
	showSelect();
}
function hiddenSelect(){
	if($id("leftcnt")){
	var items = $id("leftcnt").getElementsByTagName("select");
	for(var i=0;i<items.length;i++){
		items[i].style.visibility="hidden";
	}
	}
}
function showSelect(){
	if($id("leftcnt")){
	var items = $id("leftcnt").getElementsByTagName("select");
	for(var i=0;i<items.length;i++){
		items[i].style.visibility="visible";
	}
	}
}