// JavaScript Document
function xxk(xx,yy)
	 {
	 closeAll();
	     document.getElementById(xx).style.display="block";
		 document.getElementById(yy).className="cs1";
	 }
    function closeAll()
	{
	     document.getElementById("x1").style.display="none";
		 document.getElementById("x2").style.display="none";
		 document.getElementById("c1").className="cs2";
		 document.getElementById("c2").className="cs2";
	}