DEDE：增强友情链接申请验证并返回网站首页

if($dopost=='save')
{
    $validate = isset($validate) ? strtolower(trim($validate)) : '';
    $svali = GetCkVdValue();
    if(!$url || $url=="http://"){  
        ShowMsg('请填写网址!','-1');
        exit();
    }
    if(!$webname){ 
        ShowMsg('请填写网站名称!','-1');
        exit();
    }
    if(!$logo || !preg_match('/^http:\/\/(.*)\.(gif|png|jpg)$/i',$logo)){  
        ShowMsg('请输入正确的LOGO连接!','-1');
        exit();
    }
    if(!$msg){ 
        ShowMsg('请填写网站简况!','-1');
        exit();
    }
    if(!$email || !preg_match("/^[0-9a-zA-Z]+@(([0-9a-zA-Z]+)[.])+[a-z]{2,4}$/i",$email)){ 
        ShowMsg('请填写正确的邮件地址!','-1');
        exit();
    }
    if($validate=='' || $validate!=$svali)
    {
        ShowMsg('验证码不正确!','-1');
        exit();
    }