function showtab(obj)
{	document.getElementById("id1").style.display = "none";
	document.getElementById("id2").style.display = "none";
	document.getElementById("id3").style.display = "none";
	document.getElementById("id4").style.display = "none";
	document.getElementById("id5").style.display = "none";
    document.getElementById("id6").style.display = "none";
	document.getElementById(obj).style.display = "";
}