无刷新自动弹出页面
请问如何在ASP页面中，实现当数据库一有新的消息时，客户端就无须刷新页面，自动弹出消息提示页面。
[解决办法]
用ajax，定时向服务器端查询数据是否更新
[解决办法]
客户端必须定时请求服务器端；
asp不能创建SOCKET;
[解决办法]
ajax 可以实现。。。但前提是客户必须打开你的网站。
[解决办法]
asp+ajax技术 很简单啊 网上有资料
[解决办法]
就像这样的效果吧
原文出处：http://blog.csdn.net/guyongqing52/article/details/6849678
代码：
//-------------------------------------------
关于在右下脚弹出窗口javascript代码，并用ASP.NET在后台调用（原创）
/*
构造函数，来初始化相应的属性
*/
function PopBubble(caption,content,see){
this.content = content;
this.caption= caption;
this.see= see;
this.width= 150;
this.height = 120;
this.timeout= 150;
this.speed = 15;
this.step = 2;
this.right = screen.width -1;
this.bottom = screen.height;
this.left = this.right - this.width;
this.top= this.bottom - this.height;
this.timer = 0;
this.pause = false;
this.close = false;
this.autoHide = true;
}
/*
退宿弹出窗口的方法
*/
PopBubble.prototype.hide = function(){
var offset = this.height>this.bottom-this.top?this.height:this.bottom-this.top;
var obj = this;
if(this.timer>0){
window.clearInterval(obj.timer);
}
var fun = function(){
if(obj.pause==false||obj.close){
var x = obj.left;
var y = 0;
var width = obj.width;
var height = 0;
if(obj.offset>0){
height = obj.offset;
}
y = obj.bottom - height;
if(y>=obj.bottom){
window.clearInterval(obj.timer);
obj.Pop.hide();
} else {
obj.offset = obj.offset - obj.step;
}
obj.Pop.show(x,y,width,height);
}
}
this.timer = window.setInterval(fun,this.speed)
}
/*
实现查看超链接
*/
PopBubble.prototype.oncommand = function(){
window.parent.mainFrame.location.href="notReaderMessage.aspx";
this.close = true;
this.hide();
}
/*
显示窗口中的div并弹出窗口方法
*/
PopBubble.prototype.show = function(){
var oPopup = window.createPopup();
this.Pop = oPopup;
var w = this.width;
var h = this.height;
var str = "<DIV style='BORDER-RIGHT: #455690 1px solid; BORDER-TOP: #a6b4cf 1px solid; Z-INDEX: 99999; LEFT: 0px; BORDER-LEFT: #a6b4cf 1px solid; WIDTH: " + w + "px; BORDER-BOTTOM: #455690 1px solid; POSITION: absolute; TOP: 0px; HEIGHT: " + h + "px; BACKGROUND-COLOR: #DAED9B'>"
str += "<TABLE style='BORDER-TOP: #ffffff 1px solid; BORDER-LEFT: #ffffff 1px solid' cellSpacing=0 cellPadding=0 width='100%' bgColor=#EEF7CC border=0>"
str += "<TR>"
str += "<TD style='FONT-SIZE: 12px;COLOR: #0f2c8c' width=30 height=24></TD>"
str += "<TD style='PADDING-LEFT: 4px; FONT-WEIGHT: normal; FONT-SIZE: 12px; COLOR: #1f336b; PADDING-TOP: 4px' vAlign=center width='100%'>" + this.caption + "</TD>"
str += "</TR>"
str += "<TR>"
str += "<TD style='PADDING-RIGHT: 1px;PADDING-BOTTOM: 1px' colSpan=2 height=" + (h-28) + ">"
str += "<DIV style='BORDER-RIGHT: #b9c9ef 1px solid; PADDING-RIGHT: 8px; BORDER-TOP: #7AA14E 1px solid; PADDING-LEFT: 8px; FONT-SIZE: 12px; PADDING-BOTTOM: 8px; BORDER-LEFT: #7AA14E 1px solid; WIDTH: 100%; COLOR: #1f336b; PADDING-TOP: 8px; BORDER-BOTTOM: #b9c9ef 1px solid; HEIGHT: 100%'>" + this.content + "<BR><BR>"
str += "<DIV style='WORD-BREAK: break-all' align=left><A href='javascript:void(0)' hidefocus=true id='btCommand'><FONT color=#ff0000>" + this.see+"<embed id='soundControl' src='Windows.wav' mastersound hidden='true' loop='false' autostart='true'></embed>" + "</FONT></A></DIV>"
str += "</DIV>"
str += "</TD>"
str += "</TR>"
str += "</TABLE>"
str += "</DIV>"
oPopup.document.body.innerHTML = str;
this.offset = 0;
var obj = this;
oPopup.document.body.onmouseover = function(){obj.pause=true;}
oPopup.document.body.onmouseout = function(){obj.pause=false;}
var fun = function(){
var x = obj.left;
var y = 0;
var width = obj.width;
var height = obj.height;
if(obj.offset>obj.height){
height = obj.height;
} else {
height = obj.offset;
}
y = obj.bottom - obj.offset;
if(y<=obj.top){
obj.timeout--;
if(obj.timeout==0){
window.clearInterval(obj.timer);
if(obj.autoHide){
obj.hide();
}
}
}
else {
obj.offset = obj.offset + obj.step;
}
obj.Pop.show(x,y,width,height);
}
this.timer = window.setInterval(fun,this.speed)
var btCommand = oPopup.document.getElementById("btCommand");
btCommand.onclick = function(){
obj.oncommand();
}
}
PopBubble.prototype.rect = function(left,right,top,bottom){
try {
this.left= this.right-this.width;
this.right=this.left +this.width;
this.bottom = screen.height;
this.top = this.bottom - this.height;
} catch(e){}
}
在后台VS2008下用ASP.NET下用ScriptManager.RegisterClientScriptBlock(UpdatePanel1, this.GetType(), "", "var msg = new PopBubble('短消息提示：','您有" + isRead + "封未读消息','查看'); msg.show();", true);
方式调用，完全成功，