<!--  
	function newImage(arg) {
		if (document.images) {
			rslt = new Image();
			rslt.src = arg;
			return rslt;
		}
	}
	
	function img_on(imgname){
	    document[imgname].src = eval(imgname + "_on.src");
	}
	
	function img_off(imgname){ 
		document.images[imgname].src = eval(imgname + "_off.src"); 
	} 
	
var navclicked, navoldclicked 

function nav_img_on(imgname){
        if (!document.images[imgname].clicked) {                
		    document[imgname].src = eval(imgname + "_on.src");
		}
}

function nav_img_off(imgname){ 
        if (!document.images[imgname].clicked) { 
                document.images[imgname].src = eval(imgname + "_off.src"); 
        } 
} 


function nav_img_stayon(imgname) { 
        document.images[imgname].clicked = true ; 
        document.images[imgname].src = eval(imgname + "_on.src"); 
        if (navoldclicked != null) { 
			if (navoldclicked != imgname) {
                document.images[navoldclicked].src = eval(navoldclicked + "_off.src");
                document.images[navoldclicked].clicked = false ; 
                navoldclicked = imgname ;
			}
        } 
        else  navoldclicked = imgname ;
} 
//-->