/***********************************************************************

	External JavaScript Utility for common functionality to be
	included on all pages on the site.

***********************************************************************/


// preload images
if(document.images) {
	var imgDir = "images/";
	// on
	contactOn = new Image;	contactOn.src = imgDir + "nav_contactus_on.gif";
	homeOn = new Image; homeOn.src = imgDir + "nav_home_on.gif";
	linksOn = new Image; linksOn.src = imgDir + "nav_links_on.gif";
	whoOn = new Image; whoOn.src = imgDir + "nav_who_on.gif";
	whatOn = new Image; whatOn.src = imgDir + "nav_what_on.gif";
	// off
	contactOff = new Image;	contactOff.src = imgDir + "nav_contactus_off.gif";
	homeOff = new Image; homeOff.src = imgDir + "nav_home_off.gif";
	linksOff = new Image; linksOff.src = imgDir + "nav_links_off.gif";
	whoOff = new Image; whoOff.src = imgDir + "nav_who_off.gif";
	whatOff = new Image; whatOff.src = imgDir + "nav_what_off.gif";
	
	//subnav on
	subWho1On = new Image;	subWho1On.src = imgDir + "subnav_who1_on.gif";
	subWho2On = new Image;	subWho2On.src = imgDir + "subnav_who2_on.gif";
	subWho3On = new Image;	subWho3On.src = imgDir + "subnav_who3_on.gif";

	subWhat1On = new Image;	subWhat1On.src = imgDir + "subnav_what1_on.gif";
	subWhat2On = new Image;	subWhat2On.src = imgDir + "subnav_what2_on.gif";
	subWhat3On = new Image;	subWhat3On.src = imgDir + "subnav_what3_on.gif";
	subWhat4On = new Image;	subWhat4On.src = imgDir + "subnav_what4_on.gif";

	//subnav off
	subWho1Off = new Image;	subWho1Off.src = imgDir + "subnav_who1_off.gif";
	subWho2Off = new Image;	subWho2Off.src = imgDir + "subnav_who2_off.gif";
	subWho3Off = new Image;	subWho3Off.src = imgDir + "subnav_who3_off.gif";
	
	subWhat1Off = new Image; subWhat1Off.src = imgDir + "subnav_what1_off.gif";
	subWhat2Off = new Image; subWhat2Off.src = imgDir + "subnav_what2_off.gif";
	subWhat3Off = new Image; subWhat3Off.src = imgDir + "subnav_what3_off.gif";
	subWhat4Off = new Image; subWhat4Off.src = imgDir + "subnav_what4_off.gif";
	
	
}

// rollover function
function swap(x,y) {
	if(document.images)
		document.images[x].src = eval(y + ".src");
}