js实现多级联动的方法很多，这里给出?种5级联动的例子，其实可以扩展成N级联动,在做项目的时候碰到了这样?个问题但是有不能从数据库中动态的加载这些选项，所以只有想办法从单个的页面着手来处理了，应为项目的表单是动态产生的，所以需要每个流程的设计过程中需要有单独的页面来处理，这样就决定了不能改变已有的业务逻辑来实现多级表单的联动。Code如下：<html><head><title>级联</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><style>body,select{font-size:9pt;font-family:Verdana;}a{color:red;text-decoration:none;}a:hover{text-decoration:underline;}</style><SCRipT LANGUAGE="javaScript">function Dsy(){this.Items = {};}Dsy.PRototype.add = function(id,iArray){this.Items[id] = iArray;}Dsy.prototype.Exists = function(id){if(typeof(this.Items[id]) == "undefined")return false;return true;}function change(v){var str="0";for(i=0;i<v;i++){str+=("_"+(document.getElementById(s[i]).selectedIndex-1));};var ss=document.getElementById(s[v]);with(ss){length = 0;options[0]=new Option(opt0[v],opt0[v]);if(v && document.getElementById(s[v-1]).selectedIndex>0 || !v){if(dsy.Exists(str)){ar = dsy.Items[str];for(i=0;i<ar.length;i++)options[length]=new Option(ar[i],ar[i]);if(v)options[1].selected = true;}}if(++v<s.length){change(v);}}}var dsy = new Dsy();dsy.add("0",["投诉申告","业务咨询","用户预约","服务调度","其它"]);dsy.add("0_0",["标准化产品","行业产品","服务类产品","客户服务"]);dsy.add("0_0_0",["语音类","接入类","短信类","其它"]);dsy.add("0_0_0_0",["短号集群网","集团VPMN","移动总机","集团总机","集团彩铃","V网伴侣"]);dsy.add("0_0_0_0_0",["否认办理","拨打空号","二次确认短信问题","短信查询短号信息问题","BOSS系统故障","其它"]);dsy.add("0_0_0_0_1",["否认办理","其它"]);dsy.add("0_0_0_0_2",["拨打空号","BOSS系统故障","拨打提示【关机】"]);dsy.add("0_0_0_0_3",["其它"]);dsy.add("0_0_0_0_4",["否认办理","整个集团铃音丢失","系统故障","资费误收","无法听到集团彩铃","BOSS系统故障","铃音设置","其它"]);dsy.add("0_0_0_0_5",["否认办理","其它"]);dsy.add("0_0_0_1",["GPRS企业接入","手机邮箱（pushmail）","Blackberry","IP专线"]);dsy.add("0_0_0_1_0",["资费误收","终端无法接收","BOSS系统故障","其它"]);dsy.add("0_0_0_1_1",["套餐","终端无法接收","BOSS系统故障","其它"]);dsy.add("0_0_0_1_2",["套餐","终端无法接收","BOSS系统故障","其它"]);dsy.add("0_0_0_1_3",["数据专线","语音专线"]);dsy.add("0_0_0_2",["企信通","短信直连（MAS）","3M"]);dsy.add("0_0_0_2_0",["无法发送短信","终端无法接收","BOSS系统故障","资费误收","无法登陆","其它"]);dsy.add("0_0_0_2_1",["无法发送短信","终端无法接收","BOSS系统故障","资费误收","无法登陆","其它"]);dsy.add("0_0_0_2_2",["无法发送短信","终端无法接收","资费误收","无法登陆","其它"]);dsy.add("0_0_0_3",["移动字典","企业邮箱","其它"]);dsy.add("0_0_0_3_0",["无法登陆","其它"]);dsy.add("0_0_1",["校讯通","财讯通","警务通","银信通","城管通","政务通","物流通","其它"]);dsy.add("0_0_1_0",["否认办理","资费误收","终端延时（或无法）接收","其它"]);dsy.add("0_0_1_1",["否认办理","资费误收","终端延时（或无法）接收","其它"]);dsy.add("0_0_1_2",["终端延时（或无法）接收","其它"]);dsy.add("0_0_1_3",["否认办理","资费误收","终端延时（或无法）接收","其它"]);dsy.add("0_0_1_4",["否认办理","资费误收","终端延时（或无法）接收","其它"]);dsy.add("0_0_1_5",["否认办理","资费误收","终端延时（或无法）接收","其它"]);dsy.add("0_0_1_6",["否认办理","资费误收","终端延时（或无法）接收","其它"]);dsy.add("0_0_1_7",["其它"]);dsy.add("0_0_2",["跨市VPMN","跨市短号集群网","集团代付"]);dsy.add("0_0_2_0",["互联互通","资费误收","其它"]);dsy.add("0_0_2_1",["互联互通","资费误收","其它"]);dsy.add("0_0_2_2",["互联互通","资费误收","其它"]);dsy.add("0_0_3",["客户经理","服务厅","分销商","产品开发商"]);dsy.add("0_0_3_0",["服务态度","业务受理延时","业务受理错误","联系无应答"]);dsy.add("0_0_3_1",["服务态度","业务受理延时","业务受理错误","联系无应答"]);dsy.add("0_0_3_2",["服务态度","业务受理延时","业务受理错误","联系无应答"]);dsy.add("0_0_3_3",["服务态度","业务受理延时","业务受理错误","联系无应答"]);dsy.add("0_1",["标准化产品","行业产品","服务类产品"]);dsy.add("0_1_0",["短号集群网","移动总机","集团总机","集团彩铃","V网伴侣","GPRS企业接入","手机邮箱（pushmail）","Blackberry","IP专线","企信通","短信直连（MAS）","企业邮箱","移动字典"]);dsy.add("0_1_0_0",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_1",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_2",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_3",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_4",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_5",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_6",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_7",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_8",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_9",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_10",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_11",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_0_12",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1",["校讯通","财讯通","警务通","银信通","城管通","政务通","物流通","其它"]);dsy.add("0_1_1_0",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1_1",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1_2",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1_3",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1_4",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1_5",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1_6",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_1_7",["其它"]);dsy.add("0_1_2",["跨市VPMN","跨市短号集群网","集团代付"]);dsy.add("0_1_2_0",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_2_1",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_1_2_2",["业务办理条件及流程","产品使用功能","资费计费介绍","系统操作指引","营销方案"]);dsy.add("0_2",["产品申请","其它"]);dsy.add("0_2_0",["新建短号集群网","新建集团彩铃","新建手机邮箱","新建移动总机","新建集团总机","新建Blackberry","新建IP专线","新建短信直连","新建企信通","其它"]);dsy.add("0_2_1",["其它"]);dsy.add("0_3",["上门（驻点）服务","电话服务","其它"]);dsy.add("0_3_0",["客户经理","企信通开发商","移动总机开发商","移动名片开发商","Blackberry开发商","手机邮箱开发商","校讯通合作商","财信通合作商","物流通合作商","其它"]);dsy.add("0_3_1",["客户经理","企信通开发商","移动总机开发商","移动名片开发商","Blackberry开发商","手机邮箱开发商","校讯通合作商","财信通合作商","物流通合作商","其它"]);</SCRIPT><SCRIPT language = "Javascript">var s=["s1","s2","s3","s4","s5"];var opt0 = ["?级选择","二级选择","三级选择","四级选择","五级选择"];function setup(){for(i=0;i<s.length-1;i++)document.getElementById(s[i]).onchange=new Function("change("+(i+1)+")");change(0);}</SCRIPT></head><body bgcolor="#E0E0E0" onLoad="setup()" style="margin:0"><form name="frm"><select id="s1"><option>?级选择</option></select><select id="s2"><option>二级选择</option></select><select id="s3"><option>三级选择</option></select><select id="s4"><option>四级选择</option></select><select id="s5"><option>五级选择</option></select></form></body></html>
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