if (document.images) {
		
		// Off States
		imgNAV1off=new Image(); imgNAV1off.src="images/nav_about_off.jpg";
		imgNAV2off=new Image(); imgNAV2off.src="images/nav_products_off.jpg";
		imgNAV3off=new Image(); imgNAV3off.src="images/nav_contact_off.jpg";
		
		// On States
		imgNAV1on=new Image(); imgNAV1on.src="images/nav_about_on.jpg";
		imgNAV2on=new Image(); imgNAV2on.src="images/nav_products_on.jpg";
		imgNAV3on=new Image(); imgNAV3on.src="images/nav_contact_on.jpg";	
	}
	
 function imgOn(imgName) {
 	if (document.images) {
 		document[imgName].src=eval(imgName + "on.src");
 	}
 }

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