function show(l)
		{
			hidem();
			var id=l.href.match(/#(\w.+)/)[1];
            new Effect.BlindDown(document.getElementById(id),{duration:1.0});

		}
function hidem()
		{
			document.getElementById('tab1').style.display = "none";
			document.getElementById('tab2').style.display = "none";
			document.getElementById('tab3').style.display = "none";
			document.getElementById('tab4').style.display = "none";
		}