var IE4plus = (document.all) ? true : false;
var NS4 = (document.layers) ? true : false;

function clickIE() { return false; }

function clickNS(e) {
	if (e.which==2 || e.which==3) { return false; }
}

function disableRightClick() {
	if (!IE4plus) {
		document.captureEvents(Event.MOUSEDOWN || Event.MOUSEUP);
		document.onmousedown = clickNS;
		document.onmouseup = clickNS;
		// For NS 6+
		document.oncontextmenu = clickIE;
	}
	else {
		document.onmouseup = clickIE;
		document.oncontextmenu = clickIE;
	}
}

function MM_preloadImages() { //v3.0
	var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}


function bookmark_site() {
	if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
		window.external.AddFavorite('http://www.valveandequipment.com', 'Valve & Equipment Consulting Inc. - serving industries since 1983');
	}
	else {
		alert("Hit CTRL-D to bookmark this site for this browser.");
	}
}