mail_norm = new Image(); mail_norm.src = "img/mail_out.gif";
mail_over = new Image(); mail_over.src = "img/mail_over.gif";
phone_norm = new Image(); phone_norm.src = "img/phone_out.gif";
phone_over = new Image(); phone_over.src = "img/phone_over.gif";

       
function over(imgname)
    {
	document[imgname].src = eval(imgname+"_over.src");
	return true;
    }


function out(imgname)
    {
	document[imgname].src = eval(imgname+"_norm.src");        
	return true;
    } 

function show_phone(imgname)
    {
	if (document.layers) document.layers.phone_numbers.visibility = "visible";
	else document.all.phone_numbers.style.visibility = "visible";
	document[imgname].src = eval(imgname+"_over.src");
	return true;
    }

function hide_phone(imgname)
    {
	if (document.layers) document.layers.phone_numbers.visibility = "hidden";
	else document.all.phone_numbers.style.visibility = "hidden";
	document[imgname].src = eval(imgname+"_norm.src"); 
	return true;
    }