JavaScript"不是一个功能"问题

Question

我要做的是断开选择,取消一些热键(如Ctrl+ a,Ctrl+ c和Ctrl+ s)

我的代码看起来像那样.

(function($){

    $.fn.ctrl = function(key, callback) {
        if(typeof key != 'object') key = [key];
        callback = callback || function(){
            return false;
        }
        return $(this).keydown(function(e) {
            var ret = true;
            $.each(key,function(i,k){
                if(e.keyCode == k.toUpperCase().charCodeAt(0) && e.ctrlKey) {
                    ret = callback(e);
                }
            });
            return ret;
        });
    };


    $.fn.disableSelection = function() {
        $(window).ctrl(['a','s','c']);
        return this.each(function() {           
            $(this).attr('unselectable', 'on')
            .css({
                '-moz-user-select':'none',
                '-o-user-select':'none',
                '-khtml-user-select':'none',
                '-webkit-user-select':'none',
                '-ms-user-select':'none',
                'user-select':'none'
            })
            .each(function() {
                $(this).attr('unselectable','on')
                .bind('selectstart',function(){
                    return false;
                });
            });
        });
    }
});
$(document).ready(function() {
    $(':not(input,select,textarea)').disableSelection(); <== ERROOR
    $("#navigation").treeview({
        persist: "location",
        collapsed: true,
        unique: true
    });
});

问题是,当我在Firefox上打开页面时,在firebug上收到以下错误消息

$(":not(input,select,textarea)").disableSelection is not a function 

我错过了什么？有什么建议？Thx提前

Answer 1

你忘了将jQuery传递给你的函数(为了执行它!):

(function($){

    $.fn.ctrl = function(key, callback) { ... }

    $.fn.disableSelection = function() { ... }

})(jQuery); // <--- you forgot this!