function image_upload_check() {
	var ext = document.photos_upload.photo.value;
	ext = ext.substring(ext.length-3,ext.length);
	ext = ext.toLowerCase();
	if(ext != 'jpg') {
		alert('You selected a .'+ext+' file; please select a .jpg file instead!');
		return false;
	} else {
		return true; 
	}
} 

function avatar_upload_check() {
	var ext = document.useravatar.avatar.value;
	ext = ext.substring(ext.length-3,ext.length);
	ext = ext.toLowerCase();
	if(ext != 'jpg') {
		alert('You selected a .'+ext+' file; please select a .jpg file instead!');
		return false;
	} else {
		return true;
	}
}