function cngjpg(n){
var imgsrc = document.images[n].src;
if(imgsrc.indexOf("-on") < 0){
document.images[n].src = imgsrc.substring(0,imgsrc.length-4) + "-on.jpg";
}else{
document.images[n].src = imgsrc.substring(0,imgsrc.length-7) + ".jpg";
}
}
function cnggif(n){
var imgsrc = document.images[n].src;
if(imgsrc.indexOf("-on") < 0){
document.images[n].src = imgsrc.substring(0,imgsrc.length-4) + "-on.gif";
}else{
document.images[n].src = imgsrc.substring(0,imgsrc.length-7) + ".gif";
}
}
function cnimg(key, n){
var mapObj = key.parentNode;
var mapId = mapObj.getAttribute('id');
var imgObj = document.getElementsByTagName('img');
var imgNum = imgObj.length;
var usemap = '#' + mapId;
for (var i = 0; i < imgNum; i++){
if(imgObj[i].getAttribute('usemap') === usemap){
var imgPath = imgObj[i].src;
var ext = imgPath.substring(imgPath.lastIndexOf('.'), imgPath.length);
var suffix = '-' + n;
if(imgPath.indexOf(suffix) < 0){
imgObj[i].src = imgPath.substring(0, imgPath.length-ext.length) + suffix + ext;
}else{
imgObj[i].src = imgPath.substring(0, imgPath.length-(suffix.length + ext.length)) + ext;
}
break;
}
}
}
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];}
}