document.oncontextmenu=function(){return false;}
document.onselectstart=function(){return false;}
document.ondragstart=function(){return false;}
document.onbeforecopy=function(){return false;}

document.oncut=function(){return false}   
document.ondrag=function(){return false}   
document.oncopy=function(){return false}

onmouseup=document.selection.empty()
onselect=document.selection.empty()
oncopy=document.selection.empty()

//折叠图层
function openShutManager(oSourceObj,oTargetObj,shutAble,oOpenTip,oShutTip)
{
	var sourceObj = typeof oSourceObj == "string" ? document.getElementById(oSourceObj) : oSourceObj;
	var targetObj = typeof oTargetObj == "string" ? document.getElementById(oTargetObj) : oTargetObj;
	var openTip = oOpenTip || "";
	var shutTip = oShutTip || "";

	if(targetObj.style.display!="none")
	{
		if(shutAble) return;
		targetObj.style.display="none";
		if(openTip  &&  shutTip)
		{
		sourceObj.innerHTML = shutTip; 
		}
	}
	else
	{
		targetObj.style.display="block";
		if(openTip  &&  shutTip)
		{
		sourceObj.innerHTML = openTip; 
		}
	}
}