var n=0;
var focusNum = document.getElementById("jfocus_num");
function Mea(value){
	n=value;
	setBg(value);
	plays(value);
	}
function setBg(value){
	var n=0;
	var focusNum = document.getElementById("jfocus_num");
	for(var i=0;i<4;i++)
   if(value==i){
       focusNum.getElementsByTagName("span")[i].className = 'focus-on';
		} 
	else{
	    focusNum.getElementsByTagName("span")[i].className = 'ab';
		}  
	} 
function plays(value){
	try
	{
		with (jfocus_pic)
		{
			filters[0].Apply();
			for(i=0;i<4;i++)i==value?children[i].style.display="block":children[i].style.display="none"; 
			filters[0].play(); 
		}
	}
	catch(e)
	{
	    var divlist = document.getElementById("jfocus_pic").getElementsByTagName("span");
		for(i=0;i<4;i++)
		{
			i==value?divlist[i].style.display="block":divlist[i].style.display="none";
		}
	}
}
function clearAuto(){clearInterval(autoStart)}
function setAuto(){autoStart=setInterval("auto(n)", 3000)}
function auto(){
	n++;
	if(n>3)n=0;
	Mea(n);
} 
function sub(){
	n--;
	if(n<0)n=1;
	Mea(n);
}
setAuto();

function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
    window.onload = func;
} else {
    window.onload = function() {
      oldonload();
      func();
    }
}
}