function mouseDown(e) {
	if (parseInt(navigator.appVersion)>3) {
		var clickType=1; //1=left, 3=right
		if (navigator.appName=="Netscape"){
			clickType=e.which;
			target = e.target.type;
			if (target == undefined) return false;
		}
		else{
			clickType=event.button;
			event.srcElement.ondrag = function(){
				return false;
			}
			if (clickType != 1) return false;
		}
	}
	return true;
}
if (parseInt(navigator.appVersion)>3) {
	document.onmousedown = mouseDown;
	if (navigator.appName=="Netscape") 	document.captureEvents(Event.MOUSEDOWN);
}