on the page you sent, the server validation code is at lines 10 - 29:
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$WAFV_Redirect = "bracelets_aluminum.php";
$_SESSION['WAVT_cartstatic_769_Errors'] = "";
if ($WAFV_Redirect == "") {
$WAFV_Redirect = $_SERVER["PHP_SELF"];
}
$WAFV_Errors = "";
$WAFV_Errors .= WAValidateRQ($boh->DisplayInfo("Color") . "",true,1);
$WAFV_Errors .= WAValidateRQ($boh->DisplayInfo("Size") . "",true,2);
$WAFV_Errors .= WAValidateRQ($boh->DisplayInfo("LogoLeft") . "",true,3);
$WAFV_Errors .= WAValidateRQ($boh->DisplayInfo("LogoRight") . "",true,4);
$WAFV_Errors .= WAValidateDT($boh->DisplayInfo("Date") . "",true,"\b([12]\d|3[0-1]|0[1-9])\/(1[0-2]|0[1-9])\/\d{4}\b","","",false,".*","","",true,5);
$WAFV_Errors .= WAValidateRQ($boh->DisplayInfo("Inscription1") . "",true,6);
if ($WAFV_Errors != "") {
PostResult($WAFV_Redirect,$WAFV_Errors,"cartstatic_769");
}
}
?>