How to check input file is empty, and also display an alert if png format is selected using jquery

Question

I have got an input file upload , need to check which file is uploaded / if no file is selected by the client using jquery.

Answer 1

See the sample I have created:

http://jsfiddle.net/G7xke/

---

check

And JavaScript:

$("#check").click(function(){
    var fileName = $("#file1").val();
    if(fileName.lastIndexOf("png")===fileName.length-3)
        alert("OK");
    else
        alert("Not PNG");
})