markW = 30; // 圖檔的寬
markH = 30; // 圖檔的長
markX = 94; // 螢幕上X軸的位置
markY = 70; // 螢幕上Y軸的位置
markRefresh = 20; // 每幾千分之一秒重新定位

// set common object reference
if (!document.all) document.all = document;
if (!document.all.waterMark.style) document.all.waterMark.style = document.all.waterMark;

wMark = document.all.waterMark.style;
wMark.visibility = 'visible';
wMark.width = markW;
wMark.height = markH;
navDOM = window.innerHeight; // Nav DOM flag

function setVals() {
  barW = 0; // scrollbar compensation for PC Nav
  barH = 0;
  if (navDOM) {
    if (document.height > innerHeight) barW = 20;
    if (document.width > innerWidth) barH = 20;
  } else {
    innerWidth = document.body.clientWidth;
    innerHeight = document.body.clientHeight;
  }
  posX = ((innerWidth - markW)-barW) * (markX/100);
  posY = ((innerHeight - markH)-barH) * (markY/100);
}

function wRefresh() {
  wMark.left = posX + (navDOM?pageXOffset:document.body.scrollLeft);
  wMark.top = posY + (navDOM?pageYOffset:document.body.scrollTop);
}

function markMe() {
  setVals();
  window.onresize=setVals;
  markID = setInterval ("wRefresh()",markRefresh);
}

window.onload=markMe; // safety for Mac IE 4.5