AJAX PHP无刷新上传图片实例代码

[$key], $uploadfile))){

                
    $_msg=$_msg.$f_name.'上传成功n';
    
    
            }
   else{
   $_msg=$_msg.$f_name.'上传失败n';
   }
        }
 
    }
echo "<script>window.parent.Finish('".$_msg."');</script>"; 
?>
</body>
</html>

var isIE = (document.all) ? true : false;

var $ = function (id) {
    return "string" == typeof id ? document.getElementById(id) : id;
};

var Class = {
  create: function() {
    return function() {
      this.initialize.apply(this, arguments);
    }
  }
}

var Extend = function(destination, source) {
 for (var property in source) {
  destination[property] = source[property];
 }
}

var Bind = function(object, fun) {
 return function() {
  return fun.apply(object, arguments);
 }
}

var Each = function(list, fun){
 for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
};

//文件上传类
var FileUpload = Class.create();
FileUpload.prototype = {
  //表单对象，文件控件存放空间
  initialize: function(form, folder, options) {
 
 this.Form = $(form);//表单
 this.Folder = $(folder);//文件控件存放空间
 this.Files = [];//文件集合
 
 this.SetOptions(options);
 
 this.FileName = this.options.FileName;
 this._FrameName = this.options.FrameName;
 this.Limit = this.options.Limit;
 this.Distinct = !!this.options.Distinct;
 this.ExtIn = this.options.ExtIn;
 this.ExtOut = this.options.ExtOut;
 
 this.onIniFile = this.options.onIniFile;
 this.onEmpty = this.options.onEmpty;
 this.onNotExtIn = this.options.onNotExtIn;
 this.onExtOut = this.options.onExtOut;
 this.onLimite = this.options.onLimite;
 this.onSame = this.options.onSame;
 this.onFail = this.options.onFail;
 this.onIni = this.options.onIni;
 
 if(!this._FrameName){
  //为每个实例创建不同的iframe
  this._FrameName = "uploadFrame_" + Math.floor(Math.random() * 1000);
  //ie不能修改iframe的name
  var oFrame = isIE ? document.createElement("<iframe name="" + this._FrameName + "">") : document.createElement("iframe");
  //为ff设置name
  oFrame.name = this._FrameName;
  oFrame.style.display = "none";
  //在ie文档未加载完用appendChild会报错
  document.body.insertBefore(oFrame, document.body.childNodes[0]);
 }
 
 //设置form属性，关键是target要指向iframe
 this.Form.target = this._FrameName;
 this.Form.method = "post";
 //注意ie的form没有enctype属性，要用encoding
 this.Form.encoding = "multipart/form-data";

 //整理一次
 this.Ini();
  },
  //设置默认属性
  SetOptions: function(options) {
    this.options = {//默认值
  FileName: "Files[]",//文件上传控件的name，配合后台使用
  FrameName: "",//iframe的name，要自定义iframe的话这里设置name
  onIniFile: function(){},//整理文件时执行(其中参数是file对象)
  onEmpty: function(){},//文件空值时执行
  Limit:  10,//文件数限制，0为不限制
  onLimite: function(){},//超过文件数限制时执行
  Distinct: true,//是否不允许相同文件
  onSame:  function(){},//有相同文件时执行
  ExtIn:  ["gif","jpg","rar","zip","iso","swf","exe"],//允许后缀名
  onNotExtIn: function(){},//不是允许后缀名时执行
  ExtOut:  [],//禁止后缀名，当设置了ExtIn则ExtOut无效
  onExtOut: function(){},//是禁止后缀名时执行
  onFail:  function(){},//文件不通过检测时执行(其中参数是file对象)
  onIni:  function(){}//重置时执行
    };
    Extend(this.options, options || {});
  },
  //整理空间
  Ini: function() {
 //整理文件集合
 this.Files = [];
 //整理文件空间，把有值的file放入文件集合
 Each(this.Folder.getElementsByTagName("input"), Bind(this, function(o){
  if(o.type == "file"){ o.value && this.Files.push(o); this.onIniFile(o); }
 }))
 //插入一个新的file
 var file = document.createElement("input");
 file.name = this.FileName; file.type = "file"; file.onchange = Bind(this, function(){ this.Check(file); this.Ini(); });
 this.Folder.appendChild(file);
 //执行附加程序
 this.onIni();
  },
  //检测file对象
  Check: function(file) {
 //检测变量
 var bCheck = true;
 //空值、文件数限制、后缀名、相同文件检测
 if(!file.value){
  bCheck = false; this.onEmpty();
 } else if(this.Limit && this.Files.length >= this.Limit){
  bCheck = false; this.onLimite();
 } else if(!!this.ExtIn.length && !RegExp(".(" + this.ExtIn.join("|") + ")$", "i").test(file.value)){
  //检测是否允许后缀名
  bCheck = false; this.onNotExtIn();
 } else if(!!this.ExtOut.length && RegExp(".(" + this.ExtOut.join("|") + ")$", "i").test(file.value)) {
  //检测是否禁止后缀名
  bCheck = false; this.onExtOut();
 } else if(!!this.Distinct) {
  Each(this.Files, function(o){ if(o.value == file.value){ bCheck = false; } })
  if(!bCheck){ this.onSame(); }
 }
 //没有通过检测
 !bCheck && this.onFail(file);
  },
  //删除指定file
  Delete: function(file) {
 //移除指定file
 this.Folder.removeChild(file); this.Ini();
  },
  //删除全部file
  Clear: function() {
 //清空文件空间
 Each(this.Files, Bind(this, function(o){ this.Folder.removeChild(o); })); this.Ini();
  }
}

var fu = new FileUpload("uploadForm", "idFile", { ExtIn: ["gif","jpg"],
 onIniFile: function(file){ file.value ? file.style.display = "none" : this.Folder.removeChild(file); },
 onEmpty: function(){ alert("请选择一个文件"); },
 onLimite: function(){ alert("超过上传限制"); },
 onSame: function(){ alert("已经有相同文件"); },
 onNotExtIn: function(){ alert("只允许上传" + this.ExtIn.join("，") + "文件"); },
 onFail: function(file){ this.Folder.removeChild(file); },
 onIni: function(){
  //显示文件列表
  var arrRows = [];
  if(this.Files.length){
   var oThis = this;
   Each(this.Files, function(o){
    var a = document.createElement("a"); a.innerHTML = "取消"; a.href = "javascript:void(0);";
    a.onclick = function(){ oThis.Delete(o); return false; };
    arrRows.push([o.value, a]);
   });
  } else { arrRows.push(["<font color='gray'>没有添加文件</font>", "&nbsp;"]); }
  AddList(arrRows);
  //设置按钮
  $("idBtnupload").disabled = $("idBtndel").disabled = this.Files.length <= 0;
 }
});

$("idBtnupload").onclick = function(){
 //显示文件列表
 var arrRows = [];
 Each(fu.Files, function(o){ arrRows.push([o.value, "&nbsp;"]); });
 AddList(arrRows);
 
 fu.Folder.style.display = "none";
 $("idProcess").style.display = "";
 $("idMsg").innerHTML = "正在添加文件到您的网盘中，请稍候……<br />有可能因为网络问题，出现程序长时间无响应，请点击“<a href='?'><font color='red'>取消</font></a>”重新上传文件";
 
 fu.Form.submit();
}

//用来添加文件列表的函数
function AddList(rows){
 //根据数组来添加列表
 var FileList = $("idFileList"), oFragment = document.createDocumentFragment();
 //用文档碎片保存列表
 Each(rows, function(cells){
  var row = document.createElement("tr");
  Each(cells, function(o){
   var cell = document.createElement("td");
   if(typeof o == "string"){ cell.innerHTML = o; }else{ cell.appendChild(o); }
   row.appendChild(cell);
  });
  oFragment.appendChild(row);
 })
 //ie的table不支持innerHTML所以这样清空table
 while(FileList.hasChildNodes()){ FileList.removeChild(FileList.firstChild); }
 FileList.appendChild(oFragment);
}

$("idLimit").innerHTML = fu.Limit;

$("idExt").innerHTML = fu.ExtIn.join("，");

$("idBtndel").onclick = function(){ fu.Clear(); }

//在后台通过window.parent来访问主页面的函数
function Finish(msg){ alert(msg); location.href = location.href; }

</script>
</body>
</html>