因为有需求，当有新消息时，需要类似于QQ那样弹出提示框。实现如下：
1、alertMessage.js
/* * 消息构造 */ function CLASS_MSN_MESSAGE(id,width,height,caption,title,message,target,action){ this.id = id; this.title = title; this.caption= caption; this.message= message; this.target = target; this.action = action; this.width = width?200; this.height = height?height:120; this.timeout= 150; this.speed = 2000; this.step = 1; 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; } /**//* * 隐藏消息方法 */ CLASS_MSN_MESSAGE.prototype.hide = function(){ if(this.onunload()){ var offset = this.height>this.bottom-this.top?this.height:this.bottom-this.top; var me = this; if(this.timer>0){ window.clearInterval(me.timer); } var fun = function(){ if(me.pause==false||me.close){ var x = me.left; var y = 0; var width = me.width; var height = 0; if(me.offset>0){ height = me.offset; } y = me.bottom - height; if(y>=me.bottom){ window.clearInterval(me.timer); me.Pop.hide(); } else { me.offset = me.offset - me.step; } me.Pop.show(x,y,width,height); } } this.timer = window.setInterval(fun,this.speed) } } /**//* * 消息卸载事件，可以重写 */ CLASS_MSN_MESSAGE.prototype.onunload = function() { return true; } /**//* * 消息命令事件，要实现自己的连接，请重写它 * */ CLASS_MSN_MESSAGE.prototype.oncommand = function(){ //this.close = true; this.hide(); window.open("http://www.baidu.com"); } /**//* * 消息显示方法 */ CLASS_MSN_MESSAGE.prototype.show = function(){ var oPopup = window.createPopup(); //IE5.5+ 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: #c9d3f3'>" str += "<TABLE style='BORDER-TOP: #ffffff 1px solid; BORDER-LEFT: #ffffff 1px solid' cellSpacing=0 cellPadding=0 width='100%' bgColor=#cfdef4 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 += "<TD style='PADDING-RIGHT: 2px; PADDING-TOP: 2px' vAlign=center align=right width=19>" str += "<SPAN title=关闭 style='FONT-WEIGHT: bold; FONT-SIZE: 12px; CURSOR: hand; COLOR: red; MARGIN-RIGHT: 4px' id='btSysClose' >×</SPAN></TD>" str += "</TR>" str += "<TR>" str += "<TD style='PADDING-RIGHT: 1px;PADDING-BOTTOM: 1px' colSpan=3 height=" + (h-28) + ">" str += "<DIV style='BORDER-RIGHT: #b9c9ef 1px solid; PADDING-RIGHT: 8px; BORDER-TOP: #728eb8 1px solid; PADDING-LEFT: 8px; FONT-SIZE: 12px; PADDING-BOTTOM: 8px; BORDER-LEFT: #728eb8 1px solid; WIDTH: 100%; COLOR: #1f336b; PADDING-TOP: 8px; BORDER-BOTTOM: #b9c9ef 1px solid; HEIGHT: 100%'>" + this.title + "<BR><BR>" str += "<DIV style='WORD-BREAK: break-all' align=left> "+this.message+"</DIV>" str += "</DIV>" str += "</TD>" str += "</TR>" str += "</TABLE>" str += "</DIV>" oPopup.document.body.innerHTML = str; this.offset = 0; var me = this; oPopup.document.body.onmouseover = function(){me.pause=true;} oPopup.document.body.onmouseout = function(){me.pause=false;} var fun = function(){ var x = me.left; var y = 0; var width = me.width; var height = me.height; if(me.offset>me.height){ height = me.height; } else { height = me.offset; } y = me.bottom - me.offset; if(y<=me.top){ me.timeout--; if(me.timeout==0){ window.clearInterval(me.timer); if(me.autoHide){ me.hide(); } } } else { me.offset = me.offset + me.step; } me.Pop.show(x,y,width,height); } this.timer = window.setInterval(fun,this.speed) var btClose = oPopup.document.getElementById("btSysClose"); btClose.onclick = function(){ me.close = true; me.hide(); } /* var btCommand = oPopup.document.getElementById("btCommand"); btCommand.onclick = function(){ me.oncommand(); } // 链接中必须有一个id='messageId' var ommand = oPopup.document.getElementById("messageId"); ommand.onclick = function(){ me.hide(); window.open(ommand.href); } */ } /**//* ** 设置速度方法 **/ CLASS_MSN_MESSAGE.prototype.speed = function(s){ var t = 20; try { t = praseInt(s); } catch(e){} this.speed = t; } /**//* ** 设置步长方法 **/ CLASS_MSN_MESSAGE.prototype.step = function(s){ var t = 1; try { t = praseInt(s); } catch(e){} this.step = t; } CLASS_MSN_MESSAGE.prototype.rect = function(left,right,top,bottom){ try { this.left = left !=null?left:this.right-this.width; this.right = right !=null?right:this.left +this.width; this.bottom = bottom!=null?(bottom>screen.height?screen.height:bottom):screen.height; this.top = top !=null?top:this.bottom - this.height; } catch(e){} }
2、调用 放在公共页面上index.jsp
<script src="../js/alertMessage.js" type=text/javascript></script> <script type=text/javascript> // 自动检查新代办的时间 var validatePendingCountTime = getValidatePendingCountTime(); // 多久刷新一次页面 window.setTimeout('showPendingMessage()',validatePendingCountTime); function showPendingMessage() { var url = "pendingTaskAjaxController.do"; Ajax.load(url,function(data){ // 是否有新的待办 var flag =data.flag; // 是否有提示内容信息 var messageContent =data.messageContent; if (flag && messageContent != "") { var MSG1 = new CLASS_MSN_MESSAGE("pendingMessage",200,120,"尊敬的 <c:out value='${userInfo.userName }' /> ：", "您有待处理的待办事宜", messageContent); MSG1.rect(null,null,null,screen.height-50); MSG1.speed = 10; MSG1.step = 5; MSG1.autoHide = false; // 不自动隐藏 MSG1.show(); } }); window.setTimeout('showPendingMessage()',validatePendingCountTime); } // 获取刷新时间 function getValidatePendingCountTime() { try { // validatePendingCountTime 保存在session中 validatePendingCountTime = parseInt("<c:out value='${validatePendingCountTime }' />"); } catch(e) { validatePendingCountTime = 5; } validatePendingCountTime = validatePendingCountTime*60*1000; return validatePendingCountTime; } </script>