<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>1</title>
<meta http-equiv="imagetoolbar" content="no">
</head>
<script type="text/javascript">
function addEvent( obj, type, fn ) {
if ( obj.attachEvent ) {
obj['e'+type+fn] = fn;
obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
obj.attachEvent( 'on'+type, obj[type+fn] );
} else
obj.addEventListener( type, fn, false );
}
function removeEvent( obj, type, fn ) {
if ( obj.detachEvent ) {
obj.detachEvent( 'on'+type, obj[type+fn] );
obj[type+fn] = null;
} else
obj.removeEventListener( type, fn, false );
}addEvent(document.getElementById('aa'), 'click', function(){ alert('hello!'); } );
</script>
<body>
<div id="aa">fsad</div>
</body>
</html>上面的代码怎么老是提示"缺少对象"
<html>
<head>
<title>1</title>
<meta http-equiv="imagetoolbar" content="no">
</head>
<script type="text/javascript">
function addEvent( obj, type, fn ) {
if ( obj.attachEvent ) {
obj['e'+type+fn] = fn;
obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
obj.attachEvent( 'on'+type, obj[type+fn] );
} else
obj.addEventListener( type, fn, false );
}
function removeEvent( obj, type, fn ) {
if ( obj.detachEvent ) {
obj.detachEvent( 'on'+type, obj[type+fn] );
obj[type+fn] = null;
} else
obj.removeEventListener( type, fn, false );
}addEvent(document.getElementById('aa'), 'click', function(){ alert('hello!'); } );
</script>
<body>
<div id="aa">fsad</div>
</body>
</html>上面的代码怎么老是提示"缺少对象"
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<html>
<head>
<title>1</title>
<meta http-equiv="imagetoolbar" content="no">
</head>
<script type="text/javascript">
function addEvent( obj, type, fn ) {
if (obj.attachEvent ) {
obj['e'+type+fn] = fn;
obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
obj.attachEvent( 'on'+type, obj[type+fn] );
} else
obj.addEventListener( type, fn, false );
}
function removeEvent( obj, type, fn ) {
if ( obj.detachEvent ) {
obj.detachEvent( 'on'+type, obj[type+fn] );
obj[type+fn] = null;
} else
obj.removeEventListener( type, fn, false );
}
</script>
<body onload="addEvent(document.getElementById('aa'), 'click', function(){ alert('hello!'); } );">
<div id="aa">fsad</div>
</body>
</html>因为页面还没载入完的时候脚本就执行了,可以放到body.onload时间中执行。