function valid(){
a = document.frm;
if(a.returnname.value==""){
alert("Please enter your name.");
a.returnname.focus();
a.returnname.select();
return false;
}

if(a.returnemail.value==""){
alert("Please enter your email address.");
a.returnemail.focus();
a.returnemail.select();
return false;
}
else
{
	var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
	var returnval=emailfilter.test(document.frm.returnemail.value)
	if (returnval==false){
		alert("Please enter a valid email address.")
		document.frm.returnemail.select()
		return false;
}
}
if(a.returnordid.value==""){
alert("Please enter your order ID.");
a.returnordid.focus();
a.returnordid.select();
return false;
}
if(a.returndetails.value==""){
alert("Please enter return details.");
a.returndetails.focus();
a.returndetails.select();
return false;
}
return;
}