function showhidden(tbname1,tbname2,tbname3,tabname1,tabname2,tabname3)
	{
		//alert(tbname1 + "is ok" + tbname2 + "isnotok" + tbname3 + "isnotok");
		window.document.getElementById(tabname1).className = "tabyes";
		window.document.getElementById(tabname2).className = "tabno";
		window.document.getElementById(tabname3).className = "tabno";
		window.document.getElementById(tbname1).style.display="";
		window.document.getElementById(tbname2).style.display="none";
		window.document.getElementById(tbname3).style.display="none";
	}