<?
$filetype=$_FILES["fileUpload"]["type"];
if(($filetype!="image/jpg") and ($filetype!="image/jpeg") and ($filetype!="image/pjpeg") and ($filetype!="image/png") and ($filetype!="image/gif"))
{
echo "<script>alert('file type is wrong (jpg,png,gif only)');</script>";
exit();
}
else
{
// Upload
}
?>