复制代码 代码如下:

function checkPhoto(fnUpload)

{

var filename = fnUpload.value;

alert(filename);

var mime = filename.toLowerCase().substr(filename.lastIndexOf("."));

if(mime!=".jpg")

{

alert("请选择jpg格式的照片上传");

fnUpload.outerHTML=fnUpload.outerHTML;

}

}