function register2(theForm){
   if((theForm.username.value==null)||(theForm.username.value.length==0))
    {
    alert("用户名不能为空");
    return false;
    }
    if((theForm.password.value==null)||(theForm.password.value.length==0))
    {
    alert("密码不能为空");
    return false;
    }
    if(theForm.password.value!=theForm.confirm.value)
    {
    alert("输入的确认密码和原密码不一致，请重新输入密码");
    return false;
    }
    return true;
  }
    function turnPage(form,pageNo){
       if(pageNo==null||pageNo==""){
    pageNo = 1 ;
    }
       form.pageNo.value=pageNo;
       form.submit();
    }
  function  changePage(form){
     form.pageNo.value=1;
     form.submit();
  }
  function  changeOrderBy(form){
     form.pageNo.value=1;
     form.submit();
  }
  function  disableButton(){
   var buttons=document.body.getElementsByTagName("button");
   for(i=0;i<buttons.length;i++){
     buttons[i].disabled="true";
   }
  }
  function  enableButton(){
   var buttons=document.body.getElementsByTagName("button");
   for(i=0;i<buttons.length;i++){
     buttons[i].disabled="";
   }
  }
  function orNull(string1,string2){
      if(string1==""&&string2!=""){
          return true;
      }
      if(string2==""&&string1!=""){
          return true;
      }
      return false;
  }