/* 1-------------------------- Ê×Ò³×ó²à²Ëµ¥---------------------------- */

var lPrev;
var ltbPrev;
var ltbPrev1;
function leftmenu(time,time1,obj)
{
	if(lPrev == null)
	{
		lPrev=document.getElementById("lbt").getElementsByTagName("li")[0];
	}
	if(ltbPrev == null)
	{
		ltbPrev=document.getElementById("ltb").getElementsByTagName("div")[0];
	}
	if(ltbPrev1 == null)
	{
		ltbPrev1=document.getElementById("ltb").getElementsByTagName("div")[0];
	}

	lPrev.className = "";	
	ltbPrev.style.display = "none";
	ltbPrev1.style.display = "none";
	obj.className = "lbt_a";

    document.getElementById("program1").style.display = "none";
    document.getElementById(time).style.display = "block";
    document.getElementById(time1).style.display = "block";
   document.getElementById("img1").src = "images/ctfo1.jpg";
    
    if(time == "program")
    {
        document.getElementById("img1").src = "images/ctfo1.jpg";
        document.getElementById("img2").src = "images/focus.jpg";
    }
    if(time == "proexp_set")
    {
        document.getElementById("img1").src = "images/ctfo.jpg";
        document.getElementById("img2").src = "images/focus1.jpg";
    }
    
	lPrev = obj;
	ltbPrev = document.getElementById(time);
	ltbPrev1 = document.getElementById(time1);
}