function popitup(url)
{
	newwindow=window.open(url,'name','height=800,width=700,scrollbars=yes,resizable=1,menubar=yes');
	if (window.focus) {newwindow.focus();}
	return false;
}
function changeImage(id,foto)
{
	get_object(id).src = foto;
}

function get_object(id) 
{
	var object = null;
	if (document.layers) 
	{   
		object = document.layers[id];
	} else if (document.all)
	{
		object = document.all[id];
	}else if (document.getElementById) 
	{
		object = document.getElementById(id);
	}
    return object;
}