text: /* 上传图片预览弹出层 */
  if (typeof isloaded == 'undefined') {
  	$(function(){
  	    $(window).resize(function(){
  	        var winW = $(window).width();
  	        var winH = $(window).height();
  	        $(document).delegate('.upload-pre-item img', 'click', function() {
  	            //如果没有图片则不显示
  	            if($(this).attr('src') === undefined){
  	                return false;
  	            }
  	            // 创建弹出框以及获取弹出图片
  	            var imgPopup = "<div class=\"uploadback\"><div id=\"uploadPop\" class=\"upload-img-popup\"></div></div>"
  	            var imgItem = $(this).parent().html();
  
  	            //如果弹出层存在，则不能再弹出
  	            var popupLen = $(".uploadback").length;
  	            if( popupLen < 1 ) {
  	                $(imgPopup).appendTo("body");
  	                $(".upload-img-popup").append($(this).parent().clone());
  	                var $_a = $("<a class=\"close-pop\" href=\"javascript:;\" title=\"关闭\"></a>");
  	                $(".upload-img-popup").append($_a);
  	            }
  
  	            // 弹出层定位
  	            var uploadImg = $("#uploadPop").find("img");
  	            var popW = uploadImg.width();
  	            var popH = uploadImg.height();
  	            $(".upload-img-popup").css({
  	                // "max-width" : winW * 0.9,
  	                "left": '50%',
  	                "top": '50%',
  	                "margin-left": -popW/2-10,
  	                "margin-top": -popH/2-10,
  	            });
  	        });
  
  	        // 关闭弹出层
  	        $("body").on("click", "#uploadPop .upload-pre-item  , .uploadback", function(){
  	            $(".uploadback").remove();
  	        });
  	    }).resize();
  	})
  };
  var isloaded = true;