选择本地图片后，上传前显示在界面上，实现实时预览

1<form name="form1" id="form1" enctype="multipart/form-data">

2     <input type="submit" value=""/>

3 </form>

js代码片断：

 1 $("input[type=file]").change = function(){
 2     var uploadFile = this; 3 window.URL = window.URL || window.webkitURL; 4 var files = uploadFile.files,img = new Image(); 5 if(window.URL){ 6 console.log("files[0]:::"+JSON.stringify(files[0])); 7 8 img.src = window.URL.createObjectURL(files[0]); 9 img.width = 80; 10 img.height = 79; 11 img.onload = function(){ 12 window.URL.revokeObjectURL(this.src); 13  } 14 console.log("图片大小imgSize:::"+this.files[0].size+" img对象：：："+img.src); 15 var imgSize = this.files[0].size/1024; 16 if(imgSize > 614){ 17 mui.toast("上传图片过大，限制不超过614K"); 18 return; 19  } 20 isPic = true; 21 $("#imgList").prepend('<div class="lis"><img src="'+img.src+'" alt="" /></div>'); 22 23  } 24 }