javascript实现无限级select联动菜单
代码很简单，这里主要是给大家推荐一下本代码的实现思路，别具一格。
奉上代码：
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=gb2312"/>
<title>Selects</title>
<styletype="text/css">
*{font-size:14px;}
select{height:20px;font-size:12px;}
</style>
</head>
<body>
<divstyle='color:red'>2级联动</div>
<divid='demo1'></div><br><br><br>
<divstyle='color:red'>3级联动</div>
<divid='demo2'></div><br><br><br>
<divstyle='color:red'>4级联动</div>
<divid='demo3'></div><br><br><br>
<divstyle='color:red'>5级联动</div>
<divid='demo4'></div><br><br><br>
<scriptlanguage="javascript">
varSys=(function(ua){
vars={};
s.IE=ua.match(/msie([\d.]+)/)?true:false;
s.Firefox=ua.match(/firefox\/([\d.]+)/)?true:false;
s.Chrome=ua.match(/chrome\/([\d.]+)/)?true:false;
s.IE6=(s.IE&&([/MSIE(\d)\.0/i.exec(navigator.userAgent)][0][1]==6))?true:false;
s.IE7=(s.IE&&([/MSIE(\d)\.0/i.exec(navigator.userAgent)][0][1]==7))?true:false;
s.IE8=(s.IE&&([/MSIE(\d)\.0/i.exec(navigator.userAgent)][0][1]==8))?true:false;
returns;
})(navigator.userAgent.toLowerCase());
Sys.IE6&&document.execCommand("BackgroundImageCache",false,true);
function$(Id){
returndocument.getElementById(Id);
};
function$$(p,e){
returnp.getElementsByTagName(e);
};
functionaddListener(element,e,fn){
element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent("on"+e,fn);
};
functionremoveListener(element,e,fn){
element.removeEventListener?element.removeEventListener(e,fn,false):element.detachEvent("on"+e,fn);
};
varBind=function(object,fun){
varargs=Array.prototype.slice.call(arguments).slice(2);
returnfunction(){
returnfun.apply(object,args);
};
};
varBindAsEventListener=function(object,fun){
varargs=Array.prototype.slice.call(arguments).slice(2);
returnfunction(event){
returnfun.apply(object,[event||window.event].concat(args));
};
};
varExtend=function(destination,source){
for(varpropertyinsource){
destination[property]=source[property];
};
};
varClass=function(properties){
var_class=function(){return(arguments[0]!==null&&this.initialize&&typeof(this.initialize)=='function')?this.initialize.apply(this,arguments):this;};
_class.prototype=properties;
return_class;
};
//========================================================================================================================== varSelects=newClass({ initialize:function(container,data,title){ this.container =container; this.num=title.length; this.Events=newArray(title.length-1); vari,l,select; for(i=0;i<this.num;i++) { container.innerHTML=container.innerHTML+""+title[i]; container.appendChild(document.createElement('select')); } select=$$(container,'select')[0]; for(i=0,l=data.length;i<l;i++) select.options.add(newOption(data[i].txt,i)); addListener(select,'change',Bind(this,this.Change,select,data,0)); this.Change(select,data,0); }, Change:function(obj,data,num){ if(num==this.num-1)return; varmenu=data[obj.value].menu; select=$$(this.container,'select')[num+1]; select.length=0; if(!menu)return; if(this.Events[num]!=undefined)removeListener(select,'change',this.Events[num]) this.Events[num]=Bind(this,this.Change,select,menu,num+1) addListener(select,'change',this.Events[num]); for(vari=0,l=menu.length;i<l;i++) select.options.add(newOption(menu[i].txt,i)); this.Change(select,menu,num+1); } });
//========================================================================================================================== window.onload=function(){ vardata=[{"txt":"人族","menu":[{"txt":"大法师","menu":[{"txt":"大法技能","menu":[{"txt":"水元素","menu":[{"txt":"召唤物"},{"txt":"穿刺攻击"},{"txt":"很好东西"}]},{"txt":"暴风雪","menu":[{"txt":"魔法攻击"},{"txt":"面积伤害"},{"txt":"很漂亮"},{"txt":"可被打断"}]},{"txt":"辉煌光环"},{"txt":"瞬间移动"}]},{"txt":"英雄说明","menu":[{"txt":"智力英雄"},{"txt":"强大光环"},{"txt":"辅助型"},]}]},{"txt":"山丘之王","menu":[{"txt":"山丘技能","menu":[{"txt":"风暴之锤"},{"txt":"锥地"},{"txt":"锥晕"},{"txt":"天神下凡"}]},{"txt":"英雄说明","menu":[{"txt":"力量英雄"},{"txt":"秒杀能力"},{"txt":"个子很矮"},{"txt":"大技变态"}]}]},{"txt":"圣骑士","menu":[{"txt":"圣骑技能","menu":[{"txt":"光"},{"txt":"无敌"},{"txt":"光环"},{"txt":"复活"}]},{"txt":"英雄说明","menu":[{"txt":"力量英雄"},{"txt":"辅助英雄"},{"txt":"人称奶妈"}]}]},{"txt":"血法师","menu":[{"txt":"血法技能","menu":[{"txt":"火焰"},{"txt":"吸蓝"},{"txt":"虚无"},{"txt":"神鸟凤凰"}]},{"txt":"英雄说明","menu":[{"txt":"智力英雄"},{"txt":"辅助英雄"},{"txt":"长的很帅"}]}]}]},{"txt":"兽族","menu":[{"txt":"贱圣","menu":[{"txt":"贱圣技能","menu":[{"txt":"疾风步"},{"txt":"影分身"},{"txt":"致命一击"},{"txt":"剑刃风暴"}]},{"txt":"英雄说明","menu":[{"txt":"敏捷英雄"},{"txt":"高攻英雄"},{"txt":"杀人越货"},{"txt":"猥亵无敌"},{"txt":"非常强大"}]}]},{"txt":"先知男","menu":[{"txt":"先知技能","menu":[{"txt":"狼"},{"txt":"日"},{"txt":"闪电链"},{"txt":"地震"}]},{"txt":"英雄说明","menu":[{"txt":"智力英雄"},{"txt":"骚扰英雄"}]}]},{"txt":"牛头人酋长","menu":[{"txt":"牛头技能","menu":[{"txt":"冲击波"},{"txt":"阵地"},{"txt":"耐久光环"},{"txt":"复活"}]},{"txt":"英雄说明","menu":[{"txt":"力量英雄"},{"txt":"魔法强大"},{"txt":"长的威猛"},{"txt":"一个肉盾"}]}]},{"txt":"小YY","menu":[{"txt":"小Y技能","menu":[{"txt":"变动物"},{"txt":"治疗波"},{"txt":"小蛇棒子"},{"txt":"全体无敌"}]},{"txt":"英雄说明","menu":[{"txt":"敏捷英雄"},{"txt":"魔法强大"},{"txt":"辅助英雄"}]}]}]},{"txt":"不死族","menu":[{"txt":"死亡骑士","menu":[{"txt":"亡骑技能","menu":[{txt:"大便一拓"},{txt:"邪恶光环"},{txt:"死亡契约"},{txt:"复活亡灵"}]},{"txt":"英雄说明","menu":[{txt:"骑的是羊"},{txt:"未老先衰"},{txt:"冰霜之哀"},{txt:"啊而塞思"}]}]},{"txt":"巫妖","menu":[{"txt":"巫妖技能","menu":[{txt:"暴冰"},{txt:"冰甲"},{txt:"契约"},{txt:"死亡凋零"}]},{"txt":"英雄说明","menu":[{txt:"穿裙子"},{txt:"全是骨头"},{txt:"不男不女"}]}]},{"txt":"恐惧魔王","menu":[{"txt":"魔王技能"},{"txt":"英雄说明"}]},{"txt":"小强王子","menu":[{"txt":"王子技能"},{"txt":"英雄说明"}]}]}]; newSelects($('demo1'),data,["种族","英雄"]); newSelects($('demo2'),data,["种族","英雄","介绍"]); newSelects($('demo3'),data,["种族","英雄","介绍","技能"]); newSelects($('demo4'),data,["种族","英雄","介绍","技能","技能说明"]); } </script> </body> </html>