// JavaScript Document
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function showLayer()
{
document.getElementById('logo_layer').style.display='block';
}
function hideLayer()
{
	document.getElementById('logo_layer').style.display='none';
}


//½ü¼½
 /*setInterval("changer()",3000);
  var timercount = 1;
  function changer(){
   var imgcount = timercount;
   for(var i=1;i<2;i++){
    var imgindex = imgcount%2; 
    document.getElementById("ad").src=getImeg(imgindex); 
    document.getElementById("urlSite").href=getURL(imgindex);
	imgcount++;
    
   }
   timercount++;
  }

  function getImeg(i){
    if(i==1){
       return "20091101_best/img/banner20100318_2.jpg";
    }
    if(i==0){
       return "20091101_best/img/banner20100503_1.jpg";
    }
  }
  function getURL(j)
  {
   if(j==1){
       return "/20100317_best_Course/01.asp";
    }
    if(j==0){
        return "/20100501_best_summer/index.asp";
    }
  }*/