封装一个MessageBox的JavaScript文件

var MessageBox=
{   
                   Show:function(title, msg, w, h)
                   {
                       var titleheight = "22px"; //提示窗口标题高度
                       var bordercolor = "#666699"; //提示窗口的边框颜色
                       var titlecolor = "#FFFFFF"; //提示窗口的标题颜色
                       var titlebgcolor = "#666699";
                       var bgcolor = "#FFFFFF";
                       var iWidth = document.documentElement.clientWidth;
                       var iHeight = document.documentElement.clientHeight;
                       var bgObj = document.createElement_x("div");
                       bgObj.id = "BgDiv";
                       bgObj.style.cssText ="position:absolute;left:0px;top:0px;width:"+iWidth+"px;height:"+Math.max(document.body.clientHeight,iHeight)+"px;filter:Alpha(Opacity=80);opacity:0.3;background-color:#000000;z-index:100;";
                       document.body.appendChild(bgObj);
                       var msgObj=document.createElement_x("div");
                       msgObj.id = "MsgDiv";
                       msgObj.style.cssText = "position:absolute;font:12px'宋体';top:"+(iHeight-h)/2+"px;left:"+(iWidth-w)/2+"px;width:"+w+"px;height:"+h+"px;text-align:center;border:1pxsolid"+bordercolor+";background-color:"+bgcolor+";padding:1px;line-height:22px;z-index:102;";
                       document.body.appendChild(msgObj);
                       var table = document.createElement_x("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:bold12px '宋体';color:"+titlecolor+";border:1px solid " + bordercolor +";cursor:move;background-color:" + titlebgcolor+";";
                       titleBar.style.paddingLeft = "10px";
                       titleBar.innerHTML = title;
                       var mask = document.createElement_x("iframe");
                       mask.src="javascript:false";
                       mask.scrolling="no";
                       mask.frameborder="0";
                       mask.style.cssText ="position:absolute;z-index:"+msgObj.style.zIndex-1+";top:"+msgObj.style.top+";left:"+msgObj.style.left+";width:"+msgObj.style.width+";height:"+msgObj.style.height+";";
                       mask.style.position="absolute";
                       document.body.appendChild(mask);
                       var moveX = 0;
                       var moveY = 0;
                       var moveTop = 0;
                       var moveLeft = 0;
                       var moveable = false;
                       MessageBox.addEvent(msgObj, "mousedown", mousedown);
                       MessageBox.addEvent(msgObj, "mouseup", mouseup);
                       MessageBox.addEvent(msgObj, "selectstart", function() {returnfalse;});
                       MessageBox.addEvent(msgObj, "mousemove", mousemove);
                       var resizeEvent;
                       function mousedown()
                       {
                           moveable = true;
                           resizeEvent=window.onresize;
                           window.onresize = function()
                           {
                               bgObj.style.width = document.documentElement.clientWidth +"px";
                               bgObj.style.height = documes3Qnt.documentElement.clientHeight +"px";
                           }
                           if (MessageBox.getBrowser()=="IE")
                           msgObj.setCapture();
                           var evt = MessageBox.getEvent();
                           moveX = evt.clientX;
                           moveY = evt.clientY;
                           moveTop = parseInt(msgObj.style.top);
                           moveLeft = parseInt(msgObj.style.left);
                       }
                       function mousemove()
                       {
                           if (moveable)
                           {
                               var evt = MessageBox.getEvent();
                               var x = moveLeft + evt.clientX - moveX;
                               var y = moveTop + evt.clientY - moveY;
                               msgObj.style.left = x + "px";
                               msgObj.style.top = y + "px";
                               mask.style.left = msgObj.style.left;
                               mask.style.top = msgObj.style.top;
                           }
                       }
                       function mouseup()
                       {
                               if (moveable)
                               {
                                   moveX = 0;
                                   moveY = 0;
                                   moveTop = 0;
                                   moveLeft = 0;
                                   moveable = false;
                                   window.onresize = resizeEvent;
                                   if (MessageBox.getBrowser()=="IE") msgObj.releaseCapture();
                               }
                       }
                       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);
                           document.body.removeChild(mask);
                       }
                       var msgBox = table.insertRow(-1).insertCell(-1);
                       msgBox.id = "MsgBox";
                       msgBox.style.cssText = "font:10pt '宋体';";
                       msgBox.colSpan = 2;
                       msgBox.innerHTML = msg;
                   },
                   getEvent:function()
                   {
                       return window.event || arguments.callee.caller.arguments[0];
                   } ,
                   addEvent:function(obj,eventTypeName, fn)
                   {
                       if(obj.addEventListener)
                       {
                           obj.addEventListener(eventTypeName,fn,true);
                           return true;
                       }
                       else if(obj.attachEvent)
                       {
                           return obj.attachEvent("on"+eventTypeName,fn);
                       }
                       else
                       {
                           return false;
                       }
                   },
                   getBrowser:function()
                   {
                       var b;
                       if ((navigator.userAgent.indexOf("MSIE") >= 0)&&(navigator.userAgent.indexOf('Opera') < 0))
                       {
                           b = "IE";
                       }
                       else if (navigator.userAgent.indexOf("Firefox") >=0)
                       {
                           b = "Firefox";
                       }
                       else if (navigator.userAgent.indexOf("Opera") >=0)
                       {
                           b = "Opera";
                       }
                       else
                       {
                           b = "Other";
                       }
                       return b;
                   }
}

 

 

<head>
   <title>无标题页</title>
   <script language="javascript"src="/Scripts/MessageBox.js"></script>
</head>

<body>
<input type="button" value="点击试试"onclick="MessageBox.Show('标题','内容',300,200);"/><br/><br/>

</body>