鼠標(biāo)點擊背景變暗的按鈕特效_表單按鈕特效

用鼠標(biāo)點擊按鈕，網(wǎng)頁背景會變暗的一種特效，也是目前最常見的一種網(wǎng)頁效果，常用到用戶注冊、登錄或上傳等地方，具體到本代碼，它是一個可自定義窗口大小的彈出框效果，彈出框的高度、寬度、填充色、邊框色以及標(biāo)題都可以通過代碼來設(shè)置，個別地主使用了Event對象，用于兼容IE和FireFox。
　　

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" mrc="text/html; charset=utf-8" />
<title>鼠標(biāo)點擊背景變暗的按鈕特效</title>
<script language="javascript">
function alertWin(title, msg, w, h){ 
	var titleheight = "22px"; // 窗口標(biāo)題高度 
	var bordercolor = "#666699"; //窗口的邊框顏色 
	var titlecolor = "#FFFFFF"; // 窗口的標(biāo)題顏色 
	var titlebgcolor = "#666699"; // 窗口的標(biāo)題背景色
	var bgcolor = "#FFFFFF"; // 內(nèi)容背景色
	var iWidth = document.documentElement.clientWidth; 
	var iHeight = document.documentElement.clientHeight; 
	var bgObj = document.createElement("div"); 
	bgObj.style.cssText = "position:absolute;left:0px;top:0px;width:"+iWidth+"px;height:"+Math.max(document.body.clientHeight, iHeight)+"px;filter:Alpha(Opacity=30);opacity:0.3;background-color:#000000;z-index:101;";
	document.body.appendChild(bgObj); 	
	var msgObj=document.createElement("div");
	msgObj.style.cssText = "position:absolute;font:11px '宋體';top:"+(iHeight-h)/2+"px;left:"+(iWidth-w)/2+"px;width:"+w+"px;height:"+h+"px;text-align:center;border:1px solid "+bordercolor+";background-color:"+bgcolor+";padding:1px;line-height:22px;z-index:102;";
	document.body.appendChild(msgObj);
	
	var table = document.createElement("table");
	msgObj.appendChild(table);
	table.style.cssText = "margin:0px;border:0px;padding:0px;";
	table.cellSpacing = 0;
	var tr = table.insertRow(-1);
	var titleBar = tr.insertCell(-1);
	titleBar.style.cssText = "width:100%;height:"+titleheight+"px;text-align:left;padding:3px;margin:0px;font:bold 13px '宋體';color:"+titlecolor+";border:1px solid " + bordercolor + ";cursor:move;background-color:" + titlebgcolor;
	titleBar.style.paddingLeft = "10px";
	titleBar.innerHTML = title;
	var moveX = 0;
	var moveY = 0;
	var moveTop = 0;
	var moveLeft = 0;
	var moveable = false;
	var docMouseMoveEvent = document.onmousemove;
	var docMouseUpEvent = document.onmouseup;
	titleBar.onmousedown = function() {
		var evt = getEvent();
		moveable = true; 
		moveX = evt.clientX;
		moveY = evt.clientY;
		moveTop = parseInt(msgObj.style.top);
		moveLeft = parseInt(msgObj.style.left);
		
		document.onmousemove = function() {
			if (moveable) {
				var evt = getEvent();
				var x = moveLeft + evt.clientX - moveX;
				var y = moveTop + evt.clientY - moveY;
				if ( x > 0 &&( x + w < iWidth) && y > 0 && (y + h < iHeight) ) {
					msgObj.style.left = x + "px";
					msgObj.style.top = y + "px";
				}
			}	
		};
		document.onmouseup = function () { 
			if (moveable) { 
				document.onmousemove = docMouseMoveEvent;
				document.onmouseup = docMouseUpEvent;
				moveable = false; 
				moveX = 0;
				moveY = 0;
				moveTop = 0;
				moveLeft = 0;
			} 
		};
	}
	
	var closeBtn = tr.insertCell(-1);
	closeBtn.style.cssText = "cursor:pointer; padding:2px;background-color:" + titlebgcolor;
	closeBtn.innerHTML = "<span style='font-size:15pt; color:"+titlecolor+";'>×</span>";
	closeBtn.onclick = function(){ 
		document.body.removeChild(bgObj); 
		document.body.removeChild(msgObj); 
	} 
	var msgBox = table.insertRow(-1).insertCell(-1);
	msgBox.style.cssText = "font:10pt '宋體';";
	msgBox.colSpan  = 2;
	msgBox.innerHTML = msg;
	
function getEvent() {
	    return window.event || arguments.callee.caller.arguments[0];
    }
} 
</script>
</head>
<body>
<input type="button" value="點這里" onclick="alertWin('標(biāo)題','這里是內(nèi)容',300,200);" />
</body>
</html>

所屬頻道：表單按鈕特效/更新時間：2012-11-25

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特效說明：
表單按鈕模板-鼠標(biāo)點擊背景變暗的按鈕特效。

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