jQuery.fn.extend({ajaxUpload:function(callback){if(!this.is("form"))return;if(!arguments.callee.count){arguments.callee.count=0;}
var target="ajaxUploadFrame"+(++arguments.callee.count);var iframe=jQuery('<iframe src="" width="1" height="1" frameborder="0" '+'name="'+target+'"></iframe>');iframe.css({visibility:"hidden",position:"absolute",left:"-1000px",top:"-1000px"});iframe.appendTo("body");iframe.load(function(){jQuery.event.trigger("ajaxComplete");var iframeEl=iframe.get(0);var body;if(iframeEl.contentDocument){body=iframeEl.contentDocument.body;}else{body=iframeEl.contentWindow.document.body;}
var content=body.innerHTML;if(!content){callback();}else{eval("var data = "+content+";");callback(data);}
setTimeout(function(){iframe.remove()},1000);});this.attr({target:target,method:"post",enctype:"multipart/form-data"}).submit();jQuery.event.trigger("ajaxStart");}});