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要完成此效果需要两个步骤
第一步：把如下代码加入到<head>区域中
<script>
document.onmouseover = doOver;
document.onmouseout = doOut;
document.onmousedown = doDown;
document.onmouseup = doUp;
function doOver() {
var toEl = getReal(window.event.toElement, "className", "coolButton");
var fromEl = getReal(window.event.fromElement, "className", "coolButton");
if (toEl == fromEl) return;
var el = toEl;
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
if (el.className == "coolButton")
el.onselectstart = new Function("return false");
if ((el.className == "coolButton") && !cDisabled) {
makeRaised(el);
makeGray(el,false);
}
}
function doOut() {
var toEl = getReal(window.event.toElement, "className", "coolButton");
var fromEl = getReal(window.event.fromElement, "className", "coolButton");
if (toEl == fromEl) return;
var el = fromEl;
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
var cToggle = el.cToggle;
toggle_disabled = (cToggle != null); // If CTOGGLE atribute is present
if (cToggle && el.value) {
makePressed(el);
makeGray(el,true);
}
else if ((el.className == "coolButton") && !cDisabled) {
makeFlat(el);
makeGray(el,true);
}
}
function doDown() {
el = getReal(window.event.srcElement, "className", "coolButton");
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
if ((el.className == "coolButton") && !cDisabled) {
makePressed(el)
}
}
function doUp() {
el = getReal(window.event.srcElement, "className", "coolButton");
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
if ((el.className == "coolButton") && !cDisabled) {
makeRaised(el);
}
}
function getReal(el, type, value) {
temp = el;
while ((temp != null) && (temp.tagName != "BODY")) {
if (eval("temp." + type) == value) {
el = temp;
return el;
}
temp = temp.parentElement;
}
return el;
}
function findChildren(el, type, value) {
var children = el.children;
var tmp = new Array();
var j=0;
for (var i=0; i<children.length; i++) {
if (eval("children[i]." + type + "==\"" + value + "\"")) {
tmp[tmp.length] = children[i];
}
tmp = tmp.concat(findChildren(children[i], type, value));
}
return tmp;
}
function disable(el) {
if (document.readyState != "complete") {
window.setTimeout("disable(" + el.id + ")", 100); // If document not finished rendered try later.
return;
}
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
if (!cDisabled) {
el.cDisabled = true;
el.innerHTML = '<span style="background: buttonshadow; width: 100%; height: 100%; text-align: center;">' +
'<span style="filter:Mask(Color=buttonface) DropShadow(Color=buttonhighlight, OffX=1, OffY=1, Positive=0); height: 100%; width: 100%%; text-align: center;">' +
el.innerHTML +
'</span>' +
'</span>';
if (el.onclick != null) {
el.cDisabled_onclick = el.onclick;
el.onclick = null;
}
}
}
function enable(el) {
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
if (cDisabled) {
el.cDisabled = null;
el.innerHTML = el.children[0].children[0].innerHTML;
if (el.cDisabled_onclick != null) {
el.onclick = el.cDisabled_onclick;
el.cDisabled_onclick = null;
}
}
}
function addToggle(el) {
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
var cToggle = el.cToggle;
cToggle = (cToggle != null); // If CTOGGLE atribute is present
if (!cToggle && !cDisabled) {
el.cToggle = true;
if (el.value == null)
el.value = 0; // Start as not pressed down
if (el.onclick != null)
el.cToggle_onclick = el.onclick; // Backup the onclick
else
el.cToggle_onclick = "";
el.onclick = new Function("toggle(" + el.id +"); " + el.id + ".cToggle_onclick();");
}
}
function removeToggle(el) {
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null); // If CDISABLED atribute is present
var cToggle = el.cToggle;
cToggle = (cToggle != null); // If CTOGGLE atribute is present
if (cToggle && !cDisabled) {
el.cToggle = null;
if (el.value) {
toggle(el);
}
makeFlat(el);
if (el.cToggle_onclick != null) {
el.onclick = el.cToggle_onclick;
el.cToggle_onclick = null;
}
}
}
function toggle(el) {
el.value = !el.value;
if (el.value)
el.style.background = "URL(/images/tileback.gif)";
else
el.style.backgroundImage = "";
// doOut(el);
}
function makeFlat(el) {
with (el.style) {
background = "";
border = "1px solid buttonface";
padding = "1px";
}
}
function makeRaised(el) {
with (el.style) {
borderLeft = "1px solid buttonhighlight";
borderRight = "1px solid buttonshadow";
borderTop = "1px solid buttonhighlight";
borderBottom = "1px solid buttonshadow";
padding = "1px";
}
}
function makePressed(el) {
with (el.style) {
borderLeft = "1px solid buttonshadow";
borderRight = "1px solid buttonhighlight";
borderTop = "1px solid buttonshadow";
borderBottom = "1px solid buttonhighlight";
paddingTop = "2px";
paddingLeft = "2px";
paddingBottom = "0px";
paddingRight = "0px";
}
}
function makeGray(el,b) {
var filtval;
if (b)
filtval = "gray()";
else
filtval = "";
var imgs = findChildren(el, "tagName", "IMG");
for (var i=0; i<imgs.length; i++) {
imgs[i].style.filter = filtval;
}
}
document.write("<style>");
document.write(".coolBar {background: buttonface;border-top: 1px solid buttonhighlight; border-left: 1px solid buttonhighlight; border-bottom: 1px solid buttonshadow; border-right: 1px solid buttonshadow; padding: 2px; font: menu;}");
document.write(".coolButton {border: 1px solid buttonface; padding: 1px; text-align: center; cursor: default;}");
document.write(".coolButton IMG {filter: gray();}");
document.write("</style>");
</script>
第二步：把如下代码加入到<body>区域中
<table class="coolBar">
<tr>
<td class="coolButton"> <font size="3"><b><font color="#000000">Home</font></b></font>
</td>
<td class="coolButton"> <font size="3"><b><font color="#000000">Link</font></b></font>
</td>
</tr>
</table>
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