Edit The Code:
See Result »
Try it Yourself - ©
w3big.com
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> <script src="http://cdn.static.w3big.com/libs/jquery/1.10.2/jquery.min.js"></script> </head> <body> <script> $(function () { //将被添加到列表的一个简单的函数 var foo = function( value1, value2 ) { alert( "Received: " + value1 + "," + value2 ); }; //另一个将被添加到列表的函数 var bar = function( value1, value2 ) { alert( "foobar" ); } var callbacks = $.Callbacks(); // 添加函数到列表 callbacks.add( foo ); alert( callbacks.has( foo ) ); // true alert( callbacks.has( bar ) ); // false }) </script> </body> </html>