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 = new Function("return false")