js上传图片预览

清华大佬耗费三个月吐血整理的几百G的资源,免费分享!....>>>

    <!DOCTYPE html>  
    <html lang="en">  
    <head>  
        <meta charset="UTF-8">  
        <title>Document</title>  
        <script type="text/javascript" src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>  
        <script type="text/javascript">  
        $(function(){  
            $(".file").change(function(){  
                var fileImg = $(".fileImg");  
                var explorer = navigator.userAgent;  
                var imgSrc = $(this)[0].value;  
                if (explorer.indexOf('MSIE') >= 0) {  
                    if (!/\.(jpg|jpeg|png|JPG|PNG|JPEG)$/.test(imgSrc)) {  
                        imgSrc = "";  
                        fileImg.attr("src","/img/default.png");  
                        return false;  
                    }else{  
                        fileImg.attr("src",imgSrc);  
                    }  
                }else{  
                    if (!/\.(jpg|jpeg|png|JPG|PNG|JPEG)$/.test(imgSrc)) {  
                        imgSrc = "";  
                        fileImg.attr("src","/img/default.png");  
                        return false;  
                    }else{  
                        var file = $(this)[0].files[0];  
                        var url = URL.createObjectURL(file);  
                        fileImg.attr("src",url);  
                    }  
                }  
            })  
        })  
        </script>  
    </head>  
    <body>  
        <form enctype="multipart/form-date" method="post">  
            <input type="file" class="file">  
            <input type="submit" class="sub">  
        </form>  
        <img src="" class="fileImg">  
    </body>  
    </html>