// JScript File
    var ns4 = (document.layers); 
    var ie4 = (document.all &&!document.getElementById); 
    var ie5 = (document.all && document.getElementById); 
    var ns6 = (!document.all && document.getElementById); 
    function popUp(id) { 
	    // Netscape 4 
	    if(ns4){ 
		    document.layers[id].visibility = "show"; 
	    } 
	    // Explorer 4 
	    else if(ie4) { 
		    document.all[id].style.visibility = "visible"; 
	    } 
	    // W3C - Explorer 5+ and Mozilla
	    else if(ie5 || ns6) { 
		    document.getElementById(id).style.visibility = "visible"; 
	    }
    } 

    function popDown(id) { 
	    // Netscape 4 
	    if(ns4) { 
	    document.layers[id].visibility = "hide"; 
	    } 
	    // Explorer 4 
	    else if(ie4) { 
	    document.all[id].style.visibility = "hidden"; 
	    } 
	    // W3C - Explorer 5+ and Netscape 6+ 
	    else if(ie5 || ns6) { 
	    document.getElementById(id).style.visibility = "hidden"; 
	    } 
    }