function submitForm()
{
	if($F('foto') != '')
	{
		var parts = $F('foto').split('.');
		var ext = parts[parts.length-1].toLowerCase();
		if((ext != 'jpg') && (ext != 'jpeg') && (ext != 'png') && (ext != 'gif'))
		{
			alert('Invalid file extension\nAllowed extensions: jpg, jpeg, gif, png');
		}
		else
		{
			$('form1').submit();
		}
	}
}