<input type="file" name="file"  id="file" >

<img src=""  id="img">

　　　　$("#file").bind("change",function(){

            var url = null;

            if(window.createObjectURL != undefined) {

                url = window.createObjectURL(this.files[0]);

            } else if(window.URL != undefined) {

                url = window.URL.createObjectURL(this.files[0]);

            } else if(window.webkitURL != undefined) {

                url = window.webkitURL.createObjectURL(this.files[0]);

            }

            $("#img").attr("src",url);

        })