function showlx(sel)
{
		if(sel == 0)
		{
			document.getElementById("flight").style.display="block";
			document.getElementById("hotel").style.display="none";
			document.getElementById("trip").style.display="none";
			cximg.src="images/BJ/sousuo_bt02.gif";
		}
		if(sel == 1)
		{
			document.getElementById("flight").style.display="none";
			document.getElementById("hotel").style.display="block";
			document.getElementById("trip").style.display="none";
			cximg.src="images/BJ/sousuo_bt01.gif";
		}
		if(sel == 2)
		{
			document.getElementById("flight").style.display="none";
			document.getElementById("hotel").style.display="none";
			document.getElementById("trip").style.display="block";
			cximg.src="images/BJ/sousuo_bt03.gif";
		}
}