isDOM = document.getElementById //DOM1 browser (MSIE 5+, Netscape 6, Opera 5+)
isMSIE = document.all && document.all.item //Microsoft Internet Explorer 4+
isNetscape4 = document.layers //Netscape 4.*
isOpera = window.opera //Opera
isOpera5 = isOpera && isDOM //Opera 5+
isMSIE5 = isDOM && isMSIE && !isOpera //MSIE 5+
isMozilla = isNetscape6 = isDOM && !isMSIE && !isOpera

var obj;

function ts(e,what) {
	x = e.clientX;
	y = e.clientY;
	if(isMSIE5) {
		page_x = document.documentElement.scrollLeft;
		page_y = document.documentElement.scrollTop;
	}
	else {
		page_x = window.pageXOffset;
		page_y = window.pageYOffset;
	}
	obj = document.getElementById(what);
	if(obj) {
		obj.style.visibility = 'visible';
		obj.style.left = x + page_x + 10 + 'px';
		obj.style.top = y + page_y - obj.offsetHeight - 10 + 'px';
	}
	return true;
}

function tc() {
	if(obj)
		obj.style.visibility = 'hidden';
	return true;
}

function show(b) {
	document.getElementById(b).style.display = 'block';
	return true;
}

function hide(b) {
	document.getElementById(b).style.display = 'none';
	return true;
}

function do_show_prev(b) {
	show('prevs' + b);
	show('hide' + b);
	hide('show' + b);
	return true;
}

function do_hide_prev(b) {
	hide('prevs' + b);
	hide('hide' + b);
	show('show' + b);
	return true;
}