客户端判断文本框不能为空后不进入服务端执行

   <script language="javascript" type="text/javascript" >
   function CheckTxtBox()
   {
       var txt=new Array("txt_corpid","txt_corpname","txt_main_business_Range","txt_business_Mode","txt_contact_person","txt_contact_tel","txt_Summary","ddl_service_range","chc_cuiban");
       var txttext=new Array("服务商编码不能为空!","服务商名称不能为空!","经营范围不能为空!","经营模式不能为空!","联系人不能为空!","联系电话不能为空!","简介不能为空","请选择经营范围","短信内容不能为空");
       for(var i=0;i<txt.length;i++)
       {
        
         if(i!=txt.length-2&&i!=txt.length-1)
         {
             if(document.getElementById(txt[i]).value=="")
              {
                alert(txttext[i]);
                document.getElementById(txt[i]).select();
                event.returnValue=false;
                return;
              }
          } 
          else if(i==txt.length-1)
          {
              if(document.getElementById(txt[i]).checked==true)
               { 
                    if(document.getElementById("txt_sms_content").value=="")
                     {  
                          alert(txttext[i]);
                          document.getElementById("txt_sms_content").select();
                          event.returnValue=false;
                          return;
                     }
                 }
          }
          else
          {
              if(document.getElementById(txt[i]).selectedIndex== 0)
                alert(txttext[i]);
                event.returnValue=false;
                return;
          }
         
     }
 }
 function CheckCorID()
 {
    var txtID=document.getElementById("txt_corpid");
    if(txtID.value=="")
    {
        alert("服务商账号不能为空");
        event.returnValue=false;
       txtID.select();
    }
 }

 

弹出页面
   function ShowUpLoadFile()
  {
    var a=new Array(3);
    var a=window.showModalDialog("SelectAccount.aspx",0,"dialogWidth:750px;dialogHeight:450px;center:yes;help:no;status:no;rsizable:yes");
     if(a!=null)
     {
         if(form1.txt_corpid)
            form1.txt_corpid.value=a[0] ;
            if(form1.txt_address)
               form1.txt_address.value=a[1];
               if(form1.txt_contact_person)
               form1.txt_contact_person.value=a[2];
                 if(form1.txt_corpname)
                   form1.txt_corpname.value=a[3];
     }
    setTimeout('document.getElementById ("btn_corp_check").click()' ,100 )     
}

 

 string id = gv_corplist.SelectedDataKey.Value.ToString();
        CompanyAccount account = GetAccountByID(id);
        if(account!=null)
        {
      
            Response.Clear();
            Response.Write("<script language=javascript> var s=Array(5); " +
            "  s[0]='" + account .ComAccount +
            "';s[1]='" + account .ComAddr +
            "';s[2]='" + account .ComMan+
            "';s[3]='" + account.ComName +
            "';window.parent.returnValue=s;window.parent.close();</script>");
         }