js 代码典藏

最新推荐文章于 2025-05-11 10:33:50 发布

原创最新推荐文章于 2025-05-11 10:33:50 发布 · 1k 阅读

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#function #object #null

addEvent( object, eventType, function );

addEvent( document.getElementById('foo'), 'click', doSomething );
addEvent( obj, 'mouseover', function(){ alert('hello!'); } );

使用之前，先把下面的代码复制过来：

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 );
}