How To Validate File Format For Uploading

If you want to allow to upload file of specific format then you have to use validation java script.if some one try to upload other format file then pop message appears that "format is invalid".

 Java script <script type="text/javascript"> function file_upload() { var imgpath = document.getElementById('word').value; if(imgpath == "") { alert("upload your word file"); document.file.word.focus(); return false; } else { // code to get File Extension.. var arr1 = new Array; arr1 = imgpath.split("\\"); var len = arr1.length; var img1 = arr1[len-1]; var filext = img1.substring(img1.lastIndexOf(".")+1); // Checking Extension if(filext == "doc" || filext == "docx") { alert("File has been upload correctly") return false; } else { alert("Invalid File Format Selected"); document.form.word.focus(); return false; } } } </script>

File upload

<form name="fileupload" onsubmit="return file_upload();"> <table align="center" bgcolor="#8080FF" height="100"> <tr> <th> Fileupload:</th> <td> <input type="file" name="word" id="word" > </td> </tr> <tr> <td> <input type="submit" /> </td> </tr> </table> </form>