function signIn(){
	var thisform = document.forms['loginform'];
	if(thisform.username.value.Trim().length<2){
	   alert('输入的帐号不合法');
	   thisform.username.focus();
	}
	else if(thisform.userpswd.value.Trim().length<4){
	     alert('输入的密码不能小于4个字符!');
	     thisform.userpswd.focus();
	}
	else if(thisform.validate.value.Trim().length!=4){
	     alert('请输入正确的验证码!');
	     thisform.validate.focus();
	}
	else{
		 document.write('checklogin.php?step=landing&username='+thisform.username.value.Trim()+"&userpswd="+thisform.userpswd.value.Trim());
     //Ajax.call('checklogin.php?step=landing', 'username='+thisform.username.value.Trim()+"&userpswd="+thisform.userpswd.value.Trim(), signInResponse, 'GET', 'JSON');
	}
}






function signInResponse(result)
{	
  var mzone = document.getElementById("WEB_MEMBERZONE");
  var username = document.forms['loginform'].elements['username'].value;
  if (result.error)
  { 
	    alert(result.content);
		if(result.html)
        {
         mzone.innerHTML = result.html;	  
         document.forms['loginform'].elements['username'].value = userName;
		 document.forms['loginform'].elements['userpswd'].value = "";
        }
  }
  else{
	  if(result.enabledlogin){
	    if (mzone)
        {
          mzone.innerHTML = result.content;
        }
        else
        {
         alert("Template Error!");
        }
	  }
	  else{
	    alert('登陆失败!');
		if(result.html)
        {
         document.forms['loginform'].elements['username'].value = userName;
		 document.forms['loginform'].elements['userpswd'].value = "";
         mzone.innerHTML = result.html;
        }
	  }
  }
}

   function setTab(name,cursel,n){
    for(i=1;i<=n;i++){
    var menu=document.getElementById(name+i);
    var con=document.getElementById("con_"+name+"_"+i);
    menu.className=i==cursel?"hover":"";
    con.style.display=i==cursel?"block":"none";
    }
   }

   function checknenableitem(obj, urlname){
             var id = obj.options[obj.selectedIndex].value;
             Ajax.call(urlname+'?act=checkclass', 'id='+id, checkclassResponse, 'GET', 'JSON');
   }

   function checkclassResponse(result){
       if(result.error){
	      alert(result.content);
		  document.getElementById('parent_id').selectedIndex = 0;
	   }
   }