<input name="validate" type="text" id="vdcode" style="text-transform:uppercase;" size="8"/> 
<img id="vdimgck" align="absmiddle" onClick="this.src=this.src+'?'" style="cursor: pointer;" alt="看不清？點擊更換" src="../include/vdimgck.php"/>  
<a href="javascript:vide(-1);" onClick="changeAuthCode();">看不清？ </a>

<script type="text/javascript" language="javascript">
//驗證碼 
function changeAuthCode() { 
    var num =     new Date().getTime();
    var rand = Math.round(Math.random() * 10000);
    num = num + rand;
    $('#ver_code').css('visibility','visible');
    if ($("#vdimgck")[0]) {
        $("#vdimgck")[0].src = "../include/vdimgck.php?tag=" + num; 
 }
    return false;    
}
</script>

if(!empty($dede_fields))
       {
        $validate = empty($validate) ? '' : strtolower(trim($validate));            $svali = strtolower(GetCkVdValue());            
                if(($validate=='' || $validate != $svali) && preg_match("/6/",$safe_gdopen)){                ResetVdValue();
                ShowMsg('驗證碼不正確!',$dede_add,0,1000);
                exit;
            }
       }