isMac = (navigator.appVersion.indexOf("Mac")!=-1) ? 1 : 0;
NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all && !isMac) ? 1 : 0;
ver4 = (NS4 || IE4) ? 1 : 0;

// Rollovers
if (document.images) {       //if image object is available     
	img1on = new Image();		// MouseOver Images
	img1on.src = "images/navi/search_on.gif"; 
	img2on = new Image();
	img2on.src = "images/navi/view_on.gif";  
	img3on = new Image();
	img3on.src = "images/navi/contact_on.gif";
	img4on = new Image();
	img4on.src = "images/navi/links_on.gif";
	img7on = new Image();
	img7on.src = "images/topnavi/home_on.gif";
	img8on = new Image();
	img8on.src = "images/topnavi/project_on.gif";
	img9on = new Image();
	img9on.src = "images/topnavi/foundation_on.gif";
	img10on = new Image();
	img10on.src = "images/topnavi/members_on.gif";
	img11on = new Image();
	img11on.src = "images/go_on.gif";
	img12on = new Image();
	img12on.src = "images/go_on.gif";
	img13on = new Image();
	img13on.src = "images/go_on.gif";
	img14on = new Image();
	img14on.src = "images/search/search_viewall_on.gif";
	
	
	img1off = new Image();		  	// MouseOut Images
	img1off.src = "images/navi/search_off.gif"; 
	img2off = new Image();          
	img2off.src = "images/navi/view_off.gif";
	img3off = new Image();
	img3off.src = "images/navi/contact_off.gif";
	img4off = new Image();
	img4off.src = "images/navi/links_off.gif";
	img7off = new Image();
	img7off.src = "images/topnavi/home_off.gif";
	img8off = new Image();
	img8off.src = "images/topnavi/project_off.gif";
	img9off = new Image();
	img9off.src = "images/topnavi/foundation_off.gif";
	img10off = new Image();
	img10off.src = "images/topnavi/members_off.gif";
	img11off = new Image();
	img11off.src = "images/go_off.gif";
	img12off = new Image();
	img12off.src = "images/go_off.gif";
	img13off = new Image();
	img13off.src = "images/go_off.gif";
	img14off = new Image();
	img14off.src = "images/search/search_viewall_off.gif";
	
	img1ad = new Image();
	img1ad.src = "images/navi/search_help.gif";  // Secondary Images
	img2ad = new Image();
	img2ad.src = "images/navi/view_help.gif";
	img3ad = new Image();
	img3ad.src = "images/navi/contact_help.gif";
	img4ad = new Image();
	img4ad.src = "images/navi/links_help.gif";
}

// naviOn(imgName)
function naviOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "on.src");
		document["holder"].src = eval(imgName + "ad.src");
	}
}
// naviOff(imgName)
function naviOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
		document["holder"].src = "images/spacer.gif";
	}
}
// homeOn(imgName)
function homeOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
		document["home_icon"].src = eval(imgName + "ad.src");
	}
}
// homeOff(imgName)
function homeOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
		document["home_icon"].src = "images/spacer.gif";
	}
}

// imgOn(imgName)
function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "on.src");
	}
}
// imgOff(imgName)
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
	}
}