function alertWin(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 = "#2f97ff"; // 提示窗口的标题背景色
    var bgcolor = "#FFFFFF"; // 提示内容的背景色
	
    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 '宋体';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 '宋体';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 '宋体';";
    msgBox.colSpan  = 2;
    msgBox.innerHTML = " <br><br><table><tr><img src='http://www.trycn.com/images/js_pic.jpg'/></tr></table>"+msg;

    // 获得事件Event对象，用于兼容IE和FireFox
    function getEvent() 
    {
        return window.event || arguments.callee.caller.arguments[0];
    }
}