function img_src (obj, img_url)
{
	obj.src = img_url;
}


function number_mask (obj)
{
	tmp = '';
	for (i = 0; i < obj.value.length; i++)
		if (! isNaN (obj.value.charAt (i)) && obj.value.charAt (i) != ' ')
			tmp += obj.value.charAt (i);
	obj.value = tmp;

}


function show_pic (pic_id, w, h)
{
	l = (screen.width - w) / 2;
	t = (screen.height - h) / 2;
	window.open ('../i/pic.php?id=' + pic_id, '', 'width=' + w + ', height=' + h + ', left=' + l + ', top=' + t);
}