request.js

这是基于jsp的相册管理系统。数据库是mysql

//隐藏所有的div
function hiddenAllDivs()
{
   document.getElementById('div_ChildMenu1').style.display='none';
   document.getElementById('div_ChildMenu1').innerHTML = "";
   document.getElementById('div_ChildMenu2').style.display='none';
    document.getElementById('div_ChildMenu2').innerHTML = "";
   document.getElementById('div_ChildMenu3').style.display='none';
   document.getElementById('div_ChildMenu3').innerHTML = "";
   document.getElementById('div_ChildMenu4').style.display='none';
    document.getElementById('div_ChildMenu4').innerHTML = "";
}
//结束
function checkNull(str)
{ //如果str是非空字符串则返回true;
	if (typeof(str) == 'undefined')
     {
    	return false;
    }
	if (typeof(str) != "string")
     {
    	return false;
    }
	if (str =='') 
     {
    	return false;
    }
	if (str.length < 1)
     {
    	return false;
    }
	return true;
}
var div_name_to_fill = "";
var xmlRequest = "";
function sendRequest(url,div_name)
{//此方法为外部使用异步请求的接口
    div_name_to_fill = div_name;
   xmlRequest =  createXMLHttpRequest();
   xmlRequest.open("post",url);
   xmlRequest.onreadystatechange = fileDiv;
   xmlRequest.send(null);
}
function fileDiv()
{
   if (xmlRequest.readyState == 4)
   {
     if (xmlRequest.status == 200)
     {
       document.getElementById(div_name_to_fill).innerHTML = xmlRequest.responseText;
     }
   }
}
//结束完成异步请求，动态填充div标签
//以下是显示相册集的模块
function showAlbums(userName,div_name)
{
   var url = 'folder.jsp';
   sendRequest(url,div_name);
   hiddenAllDivs();
   document.getElementById(div_name).style.display='block';
}
//结束显示相册集的模块
//以下为显示相册内相片的模块
function showPhotos(album_id,div_name)
{
  var url = 'items.jsp?albumId='+album_id;
  sendRequest(url,div_name);
  document.getElementById(div_name).style.display='block';
}
//结束显示相册内相片的模块

//开始相册操作模块
function operatorAlbum(div_name)
{
  var url = '../create/album.jsp';
   sendRequest(url,div_name);
   hiddenAllDivs();
  document.getElementById(div_name).style.display='block';
}
//结束相册操作模块
function addPhoto(div_name)
{
	var url ='../create/up_pic.jsp';
	 sendRequest(url,div_name);
	 hiddenAllDivs();
	document.getElementById(div_name).style.display='block';
}