Js实现浮动窗口支持鼠标拖动和关闭
摘要：Js实现浮动窗口支持鼠标拖动和关闭
html代码
运行代码
<!DOCTYPE html>
<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"/>
<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)/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(/jscss/demoimg/201311/titlebar.png) repeat;cursor:move;";
dialogbody.style.cssText = dialogbodycssText;
dialogtitleimg.style.cssText = "float:left;height:20px;width:20px;background:url(/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(/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>
<!-- 显示窗口的地方 -->
<div id="here"></div><a id="clickhere" href="#">点击生成窗口</a>
<!-- 要嵌入到窗口的内容 -->
<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,"欢迎光临源码爱好者",true));
}
</script>
</body>
</html>
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