//重新获取验证字符 
function nchangeImg() 
{ 
var img = document.getElementById("Image1"); 
img.src = img.src+'?'; 
}

function clickmyimgfun()
{
    var myclickimg=document.form1.checkcode;
    
    if (myclickimg == null || myclickimg.value == "")
    {
        alert("必须输入授权码！");
        document.form1.checkcode.focus(); 
        return false;
    }
    
    var ret = YakueAjaxSets.CheckClickCode(myclickimg.value);
    if (ret == "OK") return true;
    
    alert (ret);
    
    document.form1.checkcode.focus(); 
    
    return false;
}
 
//**
 function check()
 {
 var Content =document.form1.content;
  if(Content == null || Content.value == "")
  {
   alert("留言内容不能为空");
   document.form1.content.focus();
   return false;
  }
  
  return clickmyimgfun ();
  
  }
//**
   function listenthis(e,flag)
   {   
       if (event.keyCode == 13)
       {
        var btn = document.getElementById("Submit3");
        if (btn != event.srcElement)
         {
         btn.click();
         return false;
         } 
       }
   }
   
      function listenthis1(e,flag)
   {   
       if (event.keyCode == 13)
       {
        var btn = document.getElementById("Submit2");
        if (btn != event.srcElement)
         {
         btn.click();
         return false;
         } 
       }
   }