function getSecondSelectionBox(theform,menuid) {

	/* 1.变量定义 */

	//定义菜单级别MenuClass,菜单长度数组MenuLenArr,菜单名称数组MenuArr,下级菜单数组SubMenuArr，菜单ID数组MenuIdArr
	var MenuClass,MenuLenArr,MenuArr,SubMenuArr,MenuIdArr
	var splitchar1,splitchar2 //定义分隔符：splitchar1,splitchar2
	var arr,subarr,arrlen //定义临时数组,子数组,数组长度
	var iii,kkk

	/* 2.变量赋值 */
	MenuArr=new Array()
	MenuLenArr=new Array()
	SubMenuArr=new Array()
	MenuIdArr=new Array()

	MenuArr[1]="0|||1"
	MenuArr[2]="searchFamily###家谱名称|||"
						+"searchFamily###版主登录名|||"
						+"searchFamily###近代起源省份|||"
						+"searchFamily###起源地地名|||"
						+"searchFamily###家谱堂号|||"
						+"searchFamily###记忆中的内容|||"
						+"searchMember###成员姓名|||"
						+"searchMember###成员登录名|||"
						+"searchArticle###标题|||"
						+"searchArticle###内容|||"
						+"searchArticle###所针对的家谱名|||"
						+"searchArticle###作者登录名|||"
						+"searchTribute###标题|||"
						+"searchTribute###内容|||"
						+"searchTribute###所涉及的成员名|||"
						+"searchTribute###抒怀人签名|||"
						+"searchSurname###需要探究的姓氏|||"
						+"searchCelebrity###名人姓名|||"
						+"searchCelebrity###名人历史时期|||"
						+"searchCelebrity###名人知识内容|||"
						+"searchKnowledge###家谱知识内容|||"
						+"searchToday###今日历史内容";

	MenuIdArr[1]="opCode"
	MenuIdArr[2]="opSubCode"

	MenuClass=2  //4级菜单
	splitchar1="|||";
	splitchar2="###";

	/* 3.生成数组 */
	MenuClass=2;

	for(iii=1;iii<=MenuClass;iii++) {
		arr=MenuArr[iii].split(splitchar1);
		len=arr.length;
		subarr=new Array()

		for (i=0;i<len;i++) {
		  subarr[i]=arr[i].split(splitchar2);
		}
	
		len=subarr.length;
		SubMenuArr[iii]=subarr 
		MenuLenArr[iii]=len
	}

	/* 更改下级菜单 */
	var self,submenu,thislen,thisarr;
	//self本级菜单
	//submenu子菜单
	//theform:所在表单对象[type:object]
	//menuid:本级菜单级别ID，如1级菜单则为1

	self=eval("document."+theform.name+"."+MenuIdArr[menuid])	

	submenu=eval("document."+theform.name+"."+MenuIdArr[menuid+1])	
	thislen=MenuLenArr[menuid+1]
	thisarr=SubMenuArr[menuid+1]
	submenu.length=0
	
	submenu.options.add(new Option( "请选择-----",""));     
	for (i=0;i<thislen;i++) { 
		if (thisarr[i][0] == self.value) {
			submenu.options.add(new Option(thisarr[i][1],[i]));    
	  }
	} 
  
  submenu.options[0].selected=true
}