function showsitemap() {

	backg = document.getElementById('sitemapbg');
	popsm = document.getElementById('sitemap');

	contheight=document.getElementById('cont').offsetHeight;

	backg.style.height=contheight+'px';
	backg.style.display='block';
	popsm.style.display='block';
	backg.style.opacity = 0.9;
	backg.style.filter = 'alpha(opacity=90)';

}

function hidesitemap() {

	backg.style.display='none';
	popsm.style.display='none';

}