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.ondragstart=clickIE;
	document.onselectstart=clickIE;
}

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