function clickIE() 
{
	if (document.all) {return false;}
}
function clickNS(e) 
{
	if(document.layers||(document.getElementById&&!document.all)) 
	{
        if (e.which==2||e.which==3) {return false;}
	}
}

if (document.layers) 
{
	document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;
}
else
{
	document.onmouseup=clickNS;document.oncontextmenu=clickIE;
}
document.oncontextmenu=function(){return false;};


function clickIE1() 
{
	if (document.all) {return true;}
}
function clickNS1(e) 
{
	if(document.layers||(document.getElementById&&!document.all)) 
	{
        if (e.which==2||e.which==3) {return true;}
	}
}
function cemang1()
{
if (document.layers) 
{
	document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS1;
}
else
{
	document.onmouseup=clickNS1;document.oncontextmenu=clickIE1;
}
document.oncontextmenu=function(){return true;};
}