<script language="javascript"> <!--
function check() {
    if(!document.uploadform.F1.value) {
alert('لم تختر الصورة');
    return false; }
    else
    return true;
     }
//--> </script> <form onSubmit="return check();" method="POST" enctype="multipart/form-data" name="uploadform"> <p><input type="file" name="F1" size="20"><input type="submit" value="ارسال" name="B1"></p> </form>