function hideDivs(curdiv, tag) {
	var countel = document.getElementsByClassName(tag).length;
	var i = 0;
	while (i < countel) {
		var el = document.getElementById(tag+i);
		if (null !== el) {
			if (i == curdiv) el.style.display='block';
			else el.style.display='none';
		}
		i++
	}
	return false;
}