function clickNS(e) {
	if (document.layers||(document.getElementById&&!document.all)) {
		if (e.which==2||e.which==3) {
			return false;
		}
	}
}
function clickIE4() {
	if (event.button==2) {
		return false;
	}
}
if (document.layers) {
	document.captureEvents(Event.MOUSEDOWN);
	document.onmousedown=clickNS;
} else if (document.all&&!document.getElementById) {
	document.onmousedown=clickIE4;
}
document.oncontextmenu=new Function("return false;");