<!--
       
        if (document.images) {
                  
		image1on = new Image(); 
		image1on.src = "images/nav_sys_aboutus_on.gif";   
		image3on = new Image();
		image3on.src = "images/nav_sys_location_on.gif";
		image4on = new Image(); 
		image4on.src = "images/nav_sys_contactus_on.gif";   
		image5on = new Image();
		image5on.src = "images/nav_sys_home_on.gif";
	
		image1off = new Image(); 
		image1off.src = "images/nav_sys_aboutus_off.gif"; 
		image3off = new Image();
		image3off.src = "images/nav_sys_location_off.gif";
		image4off = new Image(); 
		image4off.src = "images/nav_sys_contactus_off.gif";   
		image5off = new Image();
		image5off.src = "images/nav_sys_home_off.gif";

		image1other = new Image();
		image1other.src = "images/dyn_sys_aboutus.gif";
		image3other = new Image();
		image3other.src = "images/dyn_sys_location.gif";
		image4other = new Image();
		image4other.src = "images/dyn_sys_contactus.gif";
		image5other = new Image();
		image5other.src = "images/dyn_sys_home.gif";
                     
        }


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


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

// -->