有没有规范的方法来设置JSonHover事件与现有的onmouseover, onmouseout和某种计时器？或者当且仅当用户将鼠标悬停在元素上一定时间时触发任意函数的任何方法。
像这样的事情怎么样？
<html>
<head>
<script type="text/javascript">
var HoverListener = {
addElem: function( elem, callback, delay )
{
if ( delay === undefined )
{
delay = 1000;
}
var hoverTimer;
addEvent( elem, 'mouseover', function()
{
hoverTimer = setTimeout( callback, delay );
} );
addEvent( elem, 'mouseout', function()
{
clearTimeout( hoverTimer );
} );
}
}
function tester()
{
alert( 'hi' );
}
// Generic event abstractor
function addEvent( obj, evt, fn )
{
if ( 'undefined' != typeof obj.addEventListener )
{
obj.addEventListener( evt, fn, false );
}
else if ( 'undefined' != typeof obj.attachEvent )
{
obj.attachEvent( "on" + evt, fn );
}
}
addEvent( window, 'load', function()
{
HoverListener.addElem(
document.getElementById( 'test' )
, tester
);
HoverListener.addElem(
document.getElementById( 'test2' )
, function()
{
alert( 'Hello World!' );
}
, 2300
);
} );
</script>
</head>
<body>
<div id="test">Will alert "hi" on hover after one second</div>
<div id="test2">Will alert "Hello World!" on hover 2.3 seconds</div>
</body>
</html>
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