[Computer] 圖片隨位置而移動 Java Script

＜!--圖片隨位置而移動--＞
＜DIV id="waterMark" style="position:absolute"＞
＜A href="#top"＞＜IMG SRC="images/icon_top.gif" width=16 height=18 border=0＞＜/A＞＜/DIV＞
＜script language="JavaScript1.2"＞
＜!--// Watermark script by Paul Anderson, CNET Builder.com. All rights reserved.

markW = 16; // 圖檔的寬
markH = 18; // 圖檔的長
markX = 80; // percent right
markY = 95; // percent down
markRefresh = 5; // milliseconds

// 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.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 IE4.5

//--＞
＜/script＞
＜!--圖片隨位置而移動結束--＞