var testresults;
function checkemail(){
var str=document.Orderform.Emailclient.value;
var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
if (filter.test(str)){
testresults=true}
else{
alert("Please input a valid email address!");
testresults=false;
}
return (testresults);
}

function EmailChecker(){
if (document.layers||document.getElementById||document.all)
return checkemail();
else
return true;
}