var prev_div, prev_lnk;
function hs(lnk_id,div_id)
{
	var lnk = document.getElementById(lnk_id);
	var div = document.getElementById(div_id);
	if(lnk && div)
	{
		if(prev_lnk)
		{
			if(prev_lnk == lnk)
			{
				if(lnk.className == 'lnk_plus')
				{
					lnk.className = 'lnk_minus';
					div.style.display = 'block';
				}
				else
				{
					lnk.className = 'lnk_plus';
					div.style.display = 'none';
				}
			}
			else
			{
				prev_lnk.className = 'lnk_plus';
				prev_div.style.display = 'none';
				lnk.className = 'lnk_minus';
				div.style.display = 'block';
			}
		}
		else
		{
			if(lnk.className == 'lnk_plus')
			{
				lnk.className = 'lnk_minus';
				div.style.display = 'block';
			}
			else
			{
				lnk.className = 'lnk_plus';
				div.style.display = 'none';
			}
		}
		prev_lnk = lnk;
		prev_div = div;
	}
}