发布于 2016-11-26 07:06:03 | 140 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
本文实例讲述了JavaScript通过事件代理高亮显示表格行的方法。分享给大家供大家参考。具体实现方法如下：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Highlight Rows</title>
<style type="text/css">
table {
background-color: lightgreen;
}
#third {
background-color: yellow;
}
</style>
</head>
<body>
<!-- Demonstrating "Event Delegation" to highlight table' rows
on mouseover.
Arguments can be passed via the delegate.
My site:andrew.dx.am -->
<table id="thetable" summary="highlight demo">
<tr><td>Just one</td><td>.. no another</td></tr>
<tr><td>Second</td><td>.. no another</td></tr>
<tr id="third"><td>A third</td><td>.. no another</td></tr>
<tr><td>Fourth for luck</td><td>.. no another</td></tr>
</table>
<script type="text/javascript">
var addEvent = function (elem, eventType, func) {
if ( elem.addEventListener )
addEvent = function (elem, eventType, func) {
elem.addEventListener(eventType, func, false);
};
else if ( elem.attachEvent )
addEvent = function (elem, eventType, func) {
elem.attachEvent('on' + eventType, func);
};
addEvent(elem, eventType, func);
};
var delegateEvent = function (elem, childElems, eventType, func, args) {
addEvent(elem, eventType, function (e) {
var evt = e || window.event;
var elem = evt.target || evt.srcElement;
if ( elem.nodeName.toLowerCase() == childElems.toLowerCase() ) {
func(elem, args);
}
});
};
function highlightRows(obj, args) {
if (args && args.over) {
obj.prevColour = obj.parentNode.style.backgroundColor;
obj.parentNode.style.backgroundColor = args.colour;
if (args.index && obj.title == "")
obj.title = "Row " + obj.parentNode.rowIndex;
} else {
obj.parentNode.style.backgroundColor = "";
if (obj.title.indexOf("Row ") + 1)
obj.title = "";
}
}
function init() {
delegateEvent(document.getElementById('thetable'), 'td', 'mouseover',
highlightRows, {'colour': 'lightblue', 'over': true,
'index': true});
delegateEvent(document.getElementById('thetable'), 'td', 'mouseout',
highlightRows, {'over': false});
}
addEvent(window, 'load', init);
</script>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。