function clickIE4()
{
	if (event.button==2)
	{
		return false;
	}
}

function clickNS4(e){
alert(event.button) ;
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=clickNS4;
}
else if (document.all && !document.getElementById){
document.onmousedown=clickIE4;
}

document.oncontextmenu=new Function("return false")