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	img6on = new Image(); img6on.src = " ../images/nav_Home1.jpg"; 
	img7on = new Image();  img7on.src = "../images/nav_Admin1.jpg";
            
            	img2off = new Image();  img2off.src = "../images/nav_Teach.gif";
           	img3off = new Image();  img3off.src = "../images/nav_WebAdmin.gif";
	img5off = new Image();  img5off.src = " ../images/nav_systemmng.gif";
	img6off = new Image();  img6off.src = "../images/nav_Home.gif";
	img7off = new Image();  img7off.src = "../images/nav_Admin.gif";
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    function imgOn(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "on.src");       
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    }

    function imgOff(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "off.src");     
            }
    }
// -->