纯粹是为了打发时间,手写了一个JS的 alert控件。
代码如下:
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<html>
<head>
<script type= "text/javascript" >
var alertObj = new Object();
var generalStyle = {
zIndex: 0,
width: "200px" ,
height: "100px" ,
border: "thick solid #CCCCCC" ,
background: "#FFFFFF" ,
position: "absolute" ,
top: "35%" ,
left: "40%"
}
var txtStyle = {
textAlign: "center"
}
var btnStyle = {
position: "absolute" ,
left: "40%" ,
top: "70%" ,
color: "#333333" ,
fontWeight: "bold" ,
outlineColor: "#3366FF" ,
outlineStyle: "ridge" ,
outlineWidth: "thin" ,
//outline: "thin ridge #3366FF",
innerHTML: "OK"
}
alertObj = {
generalSet: generalStyle,
txtSet: txtStyle,
btnSet: btnStyle,
isExist: false
}
alertObj.createComponent = function () {
var component = document.createElement(arguments[0]);
var styles = arguments[1];
for ( var property in styles) {
if (styles[property] != null ) {
try {
component.style[property] = styles[property];
} catch (err){
document.write(err.name+ ":" +property+ "<br/>" ); //set property error!
}
}
}
return component;
}
alertObj.show = function () {
if (! this .isExist){
this .isExist = true ;
var bodyObj = document.body;
bodyObj.style.zIndex = -1;
bodyObj.style.background = "#999999" ;
var divObj = this .createComponent( "div" , this .generalSet);
var txtObj = this .createComponent( "p" , this .txtSet);
txtObj.innerHTML = arguments[0];
var btnObj = this .createComponent( "button" , this .btnSet);
btnObj.innerHTML = this .btnSet.innerHTML;
btnObj.onclick = function () {
bodyObj.style.zIndex=0;
bodyObj.style.background= "" ;
bodyObj.removeChild(divObj);
if (alertObj.isExist){
alertObj.isExist = false ;
}
}
divObj.appendChild(txtObj);
divObj.appendChild(btnObj);
bodyObj.appendChild(divObj);
}
}
function show(s) {
alertObj.show(s);
}
</script>
</head>
<body>
<p onclick= "show('inner test');" >Click show alert</p>
</body>
</html>
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