function popupform(myform, windowname)
{
if (!window.focus) return true;
window.open('', windowname, 'height=417,width=303,scrollbars=no');
myform.target=windowname;
return true;
}

	function CekValid()
	{
	 	var obj = document.frmInput;

	if (obj.custid.value=="")
		{alert ("Masukkan Customer ID!");
		obj.custid.focus();}
	else if (isNaN(obj.custid.value))
		{alert ("Customer ID Tidak Valid!");
		obj.custid.focus();}		
	else if (obj.birthday.value=="")
		{alert ("Masukkan Tanggal Lahir (YYYYMMDD)!");
		obj.birthday.focus();}		
	else if (isNaN(obj.birthday.value))
		{alert ("Format Birthday YYYYMMDD!");
		obj.birthday.focus();}
	else if (obj.birthday.value.length!=8)
		{alert ("Format Birthday YYYYMMDD!");
		obj.birthday.focus();}				
	else 
		{
			window.open('', 'popupReward','toolbar=0,scrollbars=0,height=417,width=303');
			//popWin.document.frmInput.custid.value = obj.custid.value;
			//popWin.document.frmInput.birthday.value = obj.birthday.value;
			//alert(obj.birthday.value);
			//alert(popWin.document.frmInput.birthday.value);
			//popWin.document.frmInput.submit();
			
			return true;			
		}
	return false;
	}