function ChangeImg() {
  if(document.images) { eval("document."+ChangeImg.arguments[0]+".src=('"+ChangeImg.arguments[1]+"')");}
}

function preload() {
  if (document.images) {
    a = document.body.clientWidth;
    var imgsrc = preload.arguments;
    arr=new Array(imgsrc.length);
    for (var j=0; j<imgsrc.length; j++) {arr[j]=new Image; arr[j].src=imgsrc[j];}
  }
}

function OnOff(n){
  var hide;
  var nTag = document.getElementById(n);
  if(nTag) {
    if( nTag.style.display == 'none') {hide = 0;}
    if( nTag.style.display == '') {hide = 1;}
  }
  hide=!hide;
  if( hide ){nTag.style.display = '';}else
    {nTag.style.display = 'none';}
}