Question

js验证文件格式return false不能停止运行，button依然提交

<script>
function getPhotoSize(obj){

photoExt=obj.value.substr(obj.value.lastIndexOf(".")).toLowerCase();//获得文件后缀名

if(photoExt!='.jpg' && photoExt!='.png' && photoExt!='.jpeg' && photoExt!='.gif'){

alert("请上传后缀名为jpg,png,jpeg,gif的照片!");

return false;

}

var fileSize = 0;

var isIE = /msie/i.test(navigator.userAgent) && !window.opera;

if (isIE && !obj.files) {

var filePath = obj.value;

var fileSystem = new ActiveXObject("Scripting.FileSystemObject");

var file = fileSystem.GetFile (filePath);

fileSize = file.Size;

}else {

fileSize = obj.files[0].size;

}

fileSize=Math.round(fileSize/1024*100)/100; //单位为KB

if(fileSize>=10){

alert("照片最大尺寸为10KB，请重新上传!");

return false;

}
}
</script>
<input type="file" id="imgFile" name="upload" onchange="getPhotoSize(this)"/>
<input type="submit" name="button" id="button" onclick="return getPhotoSize(obj)"value="提交" />

Answer 1

<input type="submit" name="button" id="button" onsubmit="return getPhotoSize(obj)" value="提交" />

追问

还是不行 ，依然能提交啊