if (document.images) {
      email = new Image();
      email.src = "images/nav_email_off.gif";
      emailover = new Image();
      emailover.src = "images/nav_email_on.gif";
      
}          

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

function popup(pagename,windowname,width,height,scroll,resize) {
		var popup = window.open(pagename,windowname,"toolbar=no,directories=no,location=no,status=no,menubar=no,scrollbars="+scroll+",resizable="+resize+",width="+width+",height="+height+",left=0,top=0");


    popup.focus();
	}