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

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

function GTC_findObj(n, d) {
  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=GTC_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function GTC_swapImage() {
  GTC_Change_Reset();
  var i,j=0,x,a=GTC_swapImage.arguments; document.GTC_sr=new Array; for(i=0;i<(a.length-2);i+=3)
  if ((x=GTC_findObj(a[i]))!=null){document.GTC_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

on_flg = 0;
change_num = 1;
changed_flg = 0;
function GTC_Change_Timer () {
	if (on_flg == 0) {
		GTC_Change_Reset();
		GTC_swapImage('top_0'+change_num,'','image/top_0'+change_num+'_o.gif','Change_area','','image/top_0'+change_num+'_change.jpg',1);
		changed_flg = 1;
		change_num++;
		if (change_num == 7) {
			change_num =1;
		}
	}
}

function GTC_Change_Reset () {
	if (changed_flg == 1) {
		GTC_swapImgRestore();
		changed_flg = 0;
	}
}