function loginAlert()
{
var myAlert = document.getElementById("login");
  //alert('1');
  myAlert.style.display = "block";
  myAlert.style.position = "absolute";
  myAlert.style.top = "50%";
  myAlert.style.left = "50%";
  myAlert.style.marginTop = "-75px";
  myAlert.style.marginLeft = "-150px";
  //alert('2');
  mybg = document.createElement("div");
  mybg.setAttribute("id","mybg");
  mybg.style.background = "#000";
  mybg.style.width = "100%";
  mybg.style.height = "100%";
  mybg.style.position = "absolute";
  mybg.style.top = "0";
  mybg.style.left = "0";
  mybg.style.zIndex = "500";
  mybg.style.opacity = "0.3";
  mybg.style.filter = "Alpha(opacity=30)";
  //alert('3');
  document.body.appendChild(mybg);
  
  document.body.style.overflow = "hidden";
 // alert('4');

}
function mClose()
{
var myAlert = document.getElementById("login");

 myAlert.style.display = "none";
 mybg.style.display = "none";
 document.body.style.overflow='';
}



//后台验证数据----------------------------------------------


function show_vote(s_name,s_id,h)
{   
/*   var showData = itr_vote.innerHTML ;

     
   showData = showData.replace(/<INPUT id=tmp_s_name type=hidden name=tmp_s_name>/g,"<input type=hidden id=s_name name=s_name value="+s_name+">") ;
   showData = showData.replace(/<INPUT id=tmp_s_id type=hidden name=tmp_s_id>/g,"<input type=hidden id=s_id name=s_id value="+s_id+">") ;
   showData = showData.replace(/tmp_vote_name/g,"vote_name") ;
   showData = showData.replace(/tmp_vote_tel/g,"vote_tel") ;
   showData = showData.replace(/tmp_input_error/g,"input_error") ;
   showData = showData.replace(/tmp_input_vote_name/g,"input_vote_name") ;
	
  ScreenConvert();DialogShow(showData,300,h,260,200) ;
  var obj_input_vote_name = gid("input_vote_name") ;
			obj_input_vote_name.innerHTML="<font color='red'>"+s_name+"</font>";
*/
}
function logins()
{
	//alert("1");
	var obj_username = gid("username") ;
	var obj_userpassword = gid("userpassword") ;
	var obj_txtRand = gid("txtRand") ;
	var obj_login_err_msg = gid("login_err_msg") ;

	
	if (obj_username.value == "" )
	{
		obj_login_err_msg.innerHTML = "<font color='red'>用户名不能为空!</font>" ;
		obj_username.focus();
		return false;
	}else if(obj_userpassword.value == "" ){
		obj_login_err_msg.innerHTML = "<font color='red'>密码不能为空!</font>" ;
		obj_userpassword.focus();
		return false;
	}else if(obj_txtRand.value == "" ){
		obj_login_err_msg.innerHTML = "<font color='red'>验证码不能为空!</font>" ;
		obj_txtRand.focus();
		return false;
	}else{
		getContentToFunc("../alertCheckUsers.jsp?username="+encodeURI(obj_username.value)+"&userpassword="+obj_userpassword.value+"&txtRand="+obj_txtRand.value, "null", logins_accept, "text") ;
	}
	
	return false;
}
function logins_accept(_str1, _str2)
{	
	var content = _str1 ;
	var state = _str2 ;

		//得到结果就进行处理
	if( content != null && state != null )
	{
		//刷新列表
		if( state == 4 )
		{
			var obj_span = getObjById("login_err_msg") ;
			if (obj_span != null)
			{
				obj_span.innerHTML = "<font color='red'>"+content+"</font>" ;
				if(content==1)
					location.reload();		
			}
			else
			{
				alert(content) ;
			}
		}
	}

}
function reload_img(){
	window.rand_img.location.reload();
}
//后台验证数据----------------------------------------------