简单实现限制uploadify上传个数

function deleteUrl(){   $("body").on("click",".img-wrap .mask span",function(event){    event.stopPropagation();              var qs=$('#file_upload-queue>div');//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>  <div class="upload-wrap" style="width:100px;">    <input type="file" name="uploadTowedAccredit" id="uploadTowedAccredit" class="filetext"/>  </div>  <span id="uploadTowedAccreditLinkTip" class="warn-tips"><em></em>请上传附件，最多上传${towedAccreditPicMax} 张</span>  <div id="towedAccreditDiv" class="up-img-list clearfix"></div></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('<em></em>上传中...');    },         //上传完成    'onUploadComplete' : function(file) {        $('.uploadify-queue').html('');        $("#uploadTowedAccreditLinkTip").html('<em></em>上传成功，待提交');    },         //上传成功    'onUploadSuccess' : function(file, data, response) {      var obj = eval('(' + data + ')');        var result=obj.result;        if(result=="true"){          var filename=obj.filename;          $('.uploadify-queue').html('');          $('#towedAccreditDiv').append("<div class='img-wrap'><img width='112' height='84' alt='' src='"+filename+"'><div class='mask'><em></em><span></span></div></div>");        }    },         //上传失败 //附件格式不正确，请上传JPG、BMP、PNG格式文件，大小不超过3MB    'onUploadError' : function(file, errorCode, errorMsg, errorString) {      switch(errorCode) {        case -100:          alert("上传的文件数量已经超出系统限制的"+$('#uploadTowedAccredit').uploadify('settings','queueSizeLimit')+"个文件！");          break;        case -110:          alert("文件 ["+file.name+"] 大小超出系统限制的"+$('#uploadTowedAccredit').uploadify('settings','fileSizeLimit')+"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    'onSelectError' : function(file, errorCode, errorMsg) {       var msgText = "上传失败/n";       switch (errorCode) {         case SWFUpload.QUEUE_ERROR.QUEUE_LIMIT_EXCEEDED:           var towedAccreditDivLen = $("#towedAccreditDiv").children().length;          msgText += "每次最多上传 " + $('#uploadTowedAccredit').uploadify('settings','uploadLimit') + "个文件";           break;         case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT:           msgText += "文件大小超过限制( " + $('#uploadTowedAccredit').uploadify('settings','fileSizeLimit') + " )";           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 " + $('#uploadTowedAccredit').uploadify('settings','fileTypeExts');           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('type')!= "application/x-shockwave-flash"){    alert('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');    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': ‘js/uploadify.swf',//所需要的flash文件‘cancelImg': ‘cancel.png',//单个取消上传的图片'script': ‘js/uploadify.php',//实现上传的程序‘folder': ‘uploads',//服务端的上传目录//'auto': true,//自动上传‘multi': true,//是否多文件上传//'checkScript': ‘js/check.php',//验证 ，服务端的‘displayData': 'speed',//进度条的显示方式//'fileDesc': ‘Image(*.jpg;*.gif;*.png)',//对话框的文件类型描述//'fileExt': ‘*.jpg;*.jpeg;*.gif;*.png',//可上传的文件类型//'sizeLimit': 999999 ,//限制上传文件的大小//'simUploadLimit' :3, //并发上传数据//'queueSizeLimit' :5, //可上传的文件个数//'buttonText' :'文件上传',//通过文字替换钮扣上的文字‘buttonImg': ‘css/images/browseBtn.png',//替换上传钮扣‘width': 80,//buttonImg的大小‘height': 24,//‘rollover': 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(“divTxt”);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><div><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></div><p></p></fieldset><FORM name=”form2″ METHOD=POST ACTION=”db.php”> <div id=”divTxt” style=”display:none”><span style=”color:red”><strong>已经上传的图片有：</strong></span& gt;<br></div><br><INPUT TYPE=”submit” value=”提 交”></FORM></body></html>