// Validate Email
function ValEmail(entered, alertbox)
{
with (entered)
{
apos=value.indexOf("@"); 
dotpos=value.lastIndexOf(".");
lastpos=value.length-1;
if (apos<1 || dotpos-apos<2 || lastpos-dotpos>4 || lastpos-dotpos<2) 
{if (alertbox!="") {alert(alertbox);} return false;}
else {return true;}
}
}