Implementation of limiting the number of uploadify uploads in js

function deleteUrl(){
   $("body").on("click",".img-wrap .mask span",function(event){
    event.stopPropagation();
          
    var qs=$('#file_upload-queue>p');//所有的队列
    var id=qs.eq(2).attr('id');//得到第三个队列的id
    $('#uploadTowedAccredit').uploadify('cancel',id);//这样就行了，会自动重置队列数量和删除dom对象，不能直接qs.eq(2).remove()，无效
      
    /*
    if(!window.confirm("您确定删除附件？")){
      return;
    }
    var imgUrl=$(this).parents(".img-wrap").find("img").attr("src");
    deleteImage(imgUrl);
    $(this).parents(".img-wrap").remove();
    */
  });
};

<li class="blockli clearfix" style="padding-bottom: 5px;">
  <span class="left-name"><em class="red-star">*</em>拖机授权委托书：</span>
  <p class="upload-wrap" style="width:100px;">
    <input type="file" name="uploadTowedAccredit" id="uploadTowedAccredit" class="filetext"/>
  </p>
  <span id="uploadTowedAccreditLinkTip" class="warn-tips"><em></em>请上传附件，最多上传${towedAccreditPicMax} 张</span>
  <p id="towedAccreditp" class="up-img-list clearfix"></p>
</li>

// 上传拖机授权委托书
function uploadTowedAccreditInit(){
   $("#uploadTowedAccredit").uploadify({
    'hideButton':'true',
    'preventCaching' : 'true',
    'checkExisting':'true',
    'swf': SWF, 
    'uploader':uploadImg,
    'debug':false,
    'multi': true,
    'method': 'post',
    'preventCaching' : true,
    'removeCompleted' : true,
    'removeTimeout' : 10,
    'requeueErrors' : true,
    'successTimeout' : 30,
    'uploadLimit' : ${towedAccreditPicMax},
     
    'fileObjName' : 'Filedata',
    //单张图片最大限制
    'fileSizeLimit' : '1024KB',
    'fileTypeDesc' : 'Image Files',
    //仅限上传jpg格式图片
    'fileTypeExts' : '*.jpg;*.png',
    'height': 24,
    'width':73,
    'buttonText' : '上传附件',
    'auto': true,
    'buttonClass':'uploada btn-fff-24',
   
    'onSWFReady' : function() {
    },
     
    'onInit':function(){
      // $("#file_upload-button").css("width","100");
     },
         
    //选择图片完成
    'onSelect' : function() {
 
    },
     
    //取消上传
    'onCancel' : function(file) {
    },
    'onCheck': function(event,data,key) {
    },
    //开始上传
    'onUploadStart' : function(file) {
      $('.uploadify-queue').html('');
    },
     
    //上传过程中
    'onUploadProgress' : function(file, bytesUploaded, bytesTotal, totalBytesUploaded, totalBytesTotal) {
      $('.uploadify-queue').html('');
      $("#uploadTowedAccreditLinkTip").html(&#39;<em></em>上传中...&#39;);
    },
     
    //上传完成
    &#39;onUploadComplete&#39; : function(file) {
        $(&#39;.uploadify-queue&#39;).html(&#39;&#39;);
        $("#uploadTowedAccreditLinkTip").html(&#39;<em></em>上传成功，待提交&#39;);
    },
     
    //上传成功
    &#39;onUploadSuccess&#39; : function(file, data, response) {
      var obj = eval(&#39;(&#39; + data + &#39;)&#39;);
        var result=obj.result;
        if(result=="true"){
          var filename=obj.filename;
          $(&#39;.uploadify-queue&#39;).html(&#39;&#39;);
          $(&#39;#towedAccreditp&#39;).append("<p class=&#39;img-wrap&#39;><img width=&#39;112&#39; height=&#39;84&#39; alt=&#39;&#39; src=&#39;"+filename+"&#39;><p class=&#39;mask&#39;><em></em><span></span></p></p>");
        }
    },
     
    //上传失败 //附件格式不正确，请上传JPG、BMP、PNG格式文件，大小不超过3MB
    &#39;onUploadError&#39; : function(file, errorCode, errorMsg, errorString) {
      switch(errorCode) {
        case -100:
          alert("上传的文件数量已经超出系统限制的"+$(&#39;#uploadTowedAccredit&#39;).uploadify(&#39;settings&#39;,&#39;queueSizeLimit&#39;)+"个文件！");
          break;
        case -110:
          alert("文件 ["+file.name+"] 大小超出系统限制的"+$(&#39;#uploadTowedAccredit&#39;).uploadify(&#39;settings&#39;,&#39;fileSizeLimit&#39;)+"大小！");
          break;
        case -120:
          alert("文件 ["+file.name+"] 大小异常！");
          break;
        case -130:
          alert("文件 ["+file.name+"] 类型不正确！");
          break;
      }
    },
    //上传失败 //附件格式不正确，请上传JPG、BMP、PNG格式文件，大小不超过3MB
    &#39;onSelectError&#39; : function(file, errorCode, errorMsg) { 
      var msgText = "上传失败\n"; 
      switch (errorCode) { 
        case SWFUpload.QUEUE_ERROR.QUEUE_LIMIT_EXCEEDED: 
          var towedAccreditpLen = $("#towedAccreditp").children().length;
          msgText += "每次最多上传 " + $(&#39;#uploadTowedAccredit&#39;).uploadify(&#39;settings&#39;,&#39;uploadLimit&#39;) + "个文件"; 
          break; 
        case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT: 
          msgText += "文件大小超过限制( " + $(&#39;#uploadTowedAccredit&#39;).uploadify(&#39;settings&#39;,&#39;fileSizeLimit&#39;) + " )"; 
          break; 
        case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE: 
          msgText += "文件大小为0"; 
          break; 
        case SWFUpload.QUEUE_ERROR.INVALID_FILETYPE: 
          msgText += "文件格式不正确，仅限 " + $(&#39;#uploadTowedAccredit&#39;).uploadify(&#39;settings&#39;,&#39;fileTypeExts&#39;); 
          break; 
        default: 
          msgText += "错误代码：" + errorCode + "\n" + errorMsg; 
      }
      alert(msgText);
    }
  });
   
  //判断用户是否有安装flash
 var obj = $("#uploadTowedAccredit").children().eq(0);
 if(obj.attr(&#39;type&#39;)!= "application/x-shockwave-flash"){
    alert(&#39;系统检测到您的浏览器没有安装flash插件，为了你能够正常上传图片，建议你安装flash&#39;);
    return;
  }
   
  $("#uploadTowedAccredit").css("float","left");
};

<html xmlns=”http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″ />
<title>php jquery uploadify多文件上传</title>
<link href=”css/default.css” rel=”stylesheet” type=”text/css” />
<link href=”css/uploadify.css” rel=”stylesheet” type=”text/css” />
<script type=”text/javascript” src=”js/jquery-1.3.2.min.js”></script>
<script type=”text/javascript” src=”js/swfobject.js”></script>
<script type=”text/javascript” src=”js/jquery.uploadify.v2.1.0.min.js”></script>
<script type=”text/javascript”>
$(document).ready(function() {
$(“#fileInput2″).uploadify({
‘uploader&#39;: ‘js/uploadify.swf&#39;,//所需要的flash文件
‘cancelImg&#39;: ‘cancel.png&#39;,//单个取消上传的图片
&#39;script&#39;: ‘js/uploadify.php&#39;,//实现上传的程序
‘folder&#39;: ‘uploads&#39;,//服务端的上传目录
//&#39;auto&#39;: true,//自动上传
‘multi&#39;: true,//是否多文件上传
//&#39;checkScript&#39;: ‘js/check.php&#39;,//验证 ，服务端的
‘displayData&#39;: &#39;speed&#39;,//进度条的显示方式
//&#39;fileDesc&#39;: ‘Image(*.jpg;*.gif;*.png)&#39;,//对话框的文件类型描述
//&#39;fileExt&#39;: ‘*.jpg;*.jpeg;*.gif;*.png&#39;,//可上传的文件类型
//&#39;sizeLimit&#39;: 999999 ,//限制上传文件的大小
//&#39;simUploadLimit&#39; :3, //并发上传数据
//&#39;queueSizeLimit&#39; :5, //可上传的文件个数
//&#39;buttonText&#39; :&#39;文件上传&#39;,//通过文字替换钮扣上的文字
‘buttonImg&#39;: ‘css/images/browseBtn.png&#39;,//替换上传钮扣
‘width&#39;: 80,//buttonImg的大小
‘height&#39;: 24,//
‘rollover&#39;: true,//button是否变换
onComplete: function (evt, queueID, fileObj, response, data) {
//alert(“Successfully uploaded: “+fileObj.filePath);
//alert(response);
getResult(response);//获得上传的文件路径
}
//onError: function(errorObj) {
// alert(errorObj.info+” “+errorObj.type);
//}
});
});
</script>
<script type=”text/javascript”>
function getResult(content){
//通过上传的图片来动态生成text来保存路径
var board = document.getElementById(“pTxt”);
board.style.display=””;
var newInput = document.createElement(“input”);
newInput.type = “text”;
newInput.size = “45″;
newInput.name=”myFilePath[]“;
var obj = board.appendChild(newInput);
var br= document.createElement(“br”);
board.appendChild(br);
obj.value=content;
}
</script>
</head>
<body>
<fieldset style=”border: 1px solid #CDCDCD; padding: 8px; padding-bottom:0px; margin: 8px 0″>
<legend> <strong> 多文件上传</strong></legend>
<p>
<input id=”fileInput2″ name=”fileInput2″ type=”file” />
<input type=”button” value=”确定上传” onclick=”javascript:$(‘#fileInput2′).uploadifyUpload();”>  
||  <a href=”javascript:$(‘#fileInput2′).uploadifyClearQueue();”>清除上传列表</a></p>
<p></p>
</fieldset>
<FORM name=”form2″ METHOD=POST ACTION=”db.php”>
 <p id=”pTxt” style=”display:none”><span style=”color:red”><strong>已经上传的图片有：</strong></span& gt;<br></p><br>
<INPUT TYPE=”submit” value=”提 交”>
</FORM>
</body>
</html>