为什么要重写 alert
项目中经常碰到提示，提示的按钮文本多种多样，经常要根据需要显示。
alert重写代码
<script>
var winAlert=window.alert;
window.alert=function(msg,dr){
var reValue=null;
if(dr){
var obj=document.createElement("span");
obj.innerHTML=msg;
obj.style.position="absolute";
obj.style.fontSize="9pt";
obj.style.left="0px";
obj.style.top="0px";
obj.style.zIndex="9999";
obj.style.visibility="hidden";
document.body.appendChild(obj);
var winWidth=obj.offsetWidth;
var winHeight=obj.offsetHeight;
dr.push(msg);
var rev=window.showModalDialog("msg.htm?"+Math.random(),dr,"dialogWidth:"+(winWidth+20)+"px;dialogHeight:"+(winHeight+70)+"px");
if(rev!=undefined)reValue=rev;
}else{
winAlert(msg);
}
return reValue;
}
</script>
调用代码
<input type="button" value="测试" onClick="alert('你不能通过禁锢你的邻人来证明你的清白.锢你的邻人来证明你的清白锢你的邻人来证明你的',['确定','取消','重置','返回'])"/>
<input type="button" value="测试" onClick="alert('你不能通过禁锢你的邻人来证明你的清白.锢你的邻人来证明你的清白锢你的邻人来证明你的')"/>
模态窗口显示页
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html>
<head>
<meta http-equiv="Content-Language" content="zh-cn">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>提示信息 </title>
<script language="javascript" type="text/javascript">
function window.onload(){
var bus=window.dialogArguments;
if(bus.length>0){
for(i=0;i<bus.length-1;i++){
var btuObj=document.createElement("input");
btuObj.type="button";
btuObj.value=" "+bus[i]+" ";
btuObj.style.marginLeft="2px";
btuObj.style.marginRight="2px";
btuObj.onclick=function(){window.returnValue=event.srcElement.value;window.close();}
buttonbox.appendChild(btuObj);
}
}else{
var btuObj=document.createElement("input");
btuObj.type="button";
btuObj.value=" 确定 ";
btuObj.onclick=function(){window.returnValue=event.srcElement.value;window.close();}
buttonbox.appendChild(btuObj);
}
msgbox.innerHTML=bus[bus.length-1];
}
function reSet(){
//window.returnValue=Event.value;
self.close();
}
</script>
</head>
<body style="background-color:ButtonFace;margin:0px" scroll="no">
<div id="outbox">
<div style="font-size:9pt;line-height:12pt;padding:10px" id="msgbox">
</div>
<div style="padding-left:10px;padding-right:10px;text-align:center" id="buttonbox">
</div>
</div>
</body>
</html>
