动态的按钮

下面为效果显示

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脚本说明:
把如下代码加入<body>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;
	
//	alert(el);
	
//	var cDisabled = el.getAttribute("cDisabled");
	var cDisabled = el.cDisabled;
//	alert(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.getAttribute("cDisabled");
	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 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;
	}

}