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Js弹出浮动窗口，支持鼠标拖动和关闭

时间：2013-11-19 16:30 来源：互联网作者：源码搜藏收藏推荐

<html>
<head>
<title>Js弹出浮动窗口，支持鼠标拖动和关闭</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
/**
关于一些参数说明：
*bodycontent:要在窗口显示的内容，dom对象
*title:窗口标题，字符串类型
*removeable:窗口能否拖动，布尔类型
*注意：内容窗体的高度是height-30px，请计算好你要显示的内容的高度和宽度。弹出窗的id为"223238909"，所以你的页面不要再取值为"223238909"的id了，以防js执行出错*/
function createdialog(width,height,bodycontent,title,removeable){
	if(document.getElementById("www_codefans_net")==null){
		/*创建窗口的组成元素*/
		var dialog = document.createElement("div");
		var dialogtitlebar= document.createElement("div");
		var dialogbody = document.createElement("div");
		var dialogtitleimg = document.createElement("span");
		var dialogtitle = document.createElement("span");
		var dialogclose = document.createElement("span");
		var closeaction = document.createElement("button");
		/*为窗口设置一个id，id如此怪异是为了尽量避免与其他用户取的id相同而出错*/
		dialog.id = "223238909";
		/*组装对话框标题栏,按从里到外的顺序组装*/
		dialogtitle.innerHTML = title;
		dialogtitlebar.appendChild(dialogtitleimg);
		dialogtitlebar.appendChild(dialogtitle);
		dialogtitlebar.appendChild(dialogclose);
		dialogclose.appendChild(closeaction);
		/*组装对话框主体内容*/
		if(bodycontent!=null){
			bodycontent.style.display = "block";
			dialogbody.appendChild(bodycontent);
		}
		/*组装成完整的对话框*/
		dialog.appendChild(dialogtitlebar);
		dialog.appendChild(dialogbody);
		/*设置窗口组成元素的样式*/
		var templeft,temptop,tempheight//窗口的位置（将窗口放在页面中间的辅助变量）
		var dialogcssText,dialogbodycssText;//拼出dialog和dialogbody的样式字符串
		templeft = (document.body.clientWidth-width)/2;
		temptop = (document.body.clientHeight-height)/2;
		tempheight= height-30;
	dialogcssText= "position:absolute;background:#65c294;padding:1px;border:4px;top:"+temptop+"px;left:"+templeft+"px;height:"+height+"px;width:"+width+"px;";
		dialogbodycssText = "width:100%;background:#ffffff;"+"height:" + tempheight + "px;";
		dialog.style.cssText = dialogcssText;
		dialogtitlebar.style.cssText = "height:30px;width:100%;background:url(http://www.codefans.net/jscss/demoimg/201311/titlebar.png) repeat;cursor:move;";
		dialogbody.style.cssText 	= dialogbodycssText;
		dialogtitleimg.style.cssText = "float:left;height:20px;width:20px;background:url(http://www.codefans.net/jscss/demoimg/201311/40.gif);"+"display:block;margin:4px;line-height:20px;";
		dialogtitle.style.cssText = "font-size:16px;float:left;display:block;margin:4px;line-height:20px;";
		dialogclose.style.cssText 	= "float:right;display:block;margin:4px;line-height:20px;";
		closeaction.style.cssText	= "height:20px;width:24px;border-width:1px;"+"background-image:url(http://www.codefans.net/jscss/demoimg/201311/close.png);cursor:pointer;";
		/*为窗口元素注册事件*/
		var dialogleft = parseInt(dialog.style.left);
		var dialogtop = parseInt(dialog.style.top);
		var ismousedown = false;//标志鼠标是否按下
		/*关闭按钮的事件*/							
		closeaction.onclick = function(){
			dialog.parentNode.removeChild(dialog);
		}
		/*实现窗口的移动，这段代码很典型，网上很多类似的代码*/
		if(removeable == true){
			var ismousedown = false;
			var dialogleft,dialogtop;
			var downX,downY;
			dialogleft = parseInt(dialog.style.left);
			dialogtop = parseInt(dialog.style.top);
			dialogtitlebar.onmousedown = function(e){
			ismousedown = true;
			downX = e.clientX;
			downY = e.clientY;
			}
			document.onmousemove = function(e){
				if(ismousedown){
				dialog.style.top = e.clientY - downY + dialogtop + "px";
				dialog.style.left = e.clientX - downX + dialogleft + "px";
				}
			}
			/*松开鼠标时要重新计算当前窗口的位置*/
			document.onmouseup = function(){
				dialogleft = parseInt(dialog.style.left);
				dialogtop = parseInt(dialog.style.top);
				ismousedown = false;
			}
		}
		return dialog;	
	}//end if(if的结束)
}
</script>
<style>
table{background:#b2d235;}
button{font-size:12px;height:23;background:#ece9d8;border-width:1;}
#linkurl,#linkname,#savelink{width:100px;}
</style>
</head>
<body>

<div id="here"></div><a id="clickhere" href="#">点击生成窗口</a>

<div id="login" style="display:none;">
        <form action="#" method="post" onSubmit="return false;">
            <table width="400" height="95">
                <tr>
                    <td width="78">链接文字</td>
                    <td width="168"><input name="link.name" type="text"/></td>
                    <td width="138" id="linktext"></td>
                </tr>
                <tr>
                    <td>链接地址</td>
                    <td><input name="link.url" type="text"/></td>
                    <td id="linkurl"></td>
                </tr>
                <tr>
                    <td></td>
                    <td><button type="submit" style="float:right;">添加</button></td>
                    <td id="savelink"></td>
                </tr>
            </table>
</form>
</div>
<script type="text/javascript">
var here = document.getElementById("here");
var login = document.getElementById("login");
var clickhere = document.getElementById("clickhere");
clickhere.onclick = function(){
here.appendChild(createdialog(400,95+30,login,"欢迎光临源码搜藏网",true));
}
</script>
</body>
</html>

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