<select >  
  <option ></option>  
  <option ></option> 
  <option ></option> 
</select> 

var arrayNation=new Array(
    '汉族','蒙古族','彝族','侗族','哈萨克族',  
    '畲族','纳西族','仫佬族','仡佬族','怒族','保安族',     
    '鄂伦春族','回族','壮族','瑶族','傣族','高山族',     
    '景颇族','羌族','锡伯族','乌孜别克族','裕固族','赫哲族',    
    '藏族','布依族','白族','黎族','拉祜族','柯尔克孜族','布朗族',    
    '阿昌族','俄罗斯族','京族','门巴族','维吾尔族','朝鲜族',  
    '土家族','傈僳族','水族','土族','撒拉族','普米族','鄂温克族',  
    '塔塔尔族','珞巴族','苗族','满族','哈尼族','佤族','东乡族',   
    '达斡尔族','毛南族','塔吉克族','德昂族','独龙族','基诺族'); 

var arrayShengXiao=new Array(
    '鼠','牛','虎','兔','蛇',
    '蛇','马','羊','猴','鸡','狗','猪'); 

var arrayDegree=new Array(
    '小学','初中','高中','中专',
    '大专','本科','硕士','博士');

 /** *创建民族选择框 */ 
function createNationSelect(name,str) { 
    document.write("<select id='selectNation'></select>"); 
    var select=document.getElementById("selectNation"); 
    for(var i=0;i<arrayNation.length;i=i+1) {  
        select.name=name;  
        var opt=document.createElement("option");  
        opt.value=arrayNation;  
        opt.innerText=arrayNation;  
        if(arrayNation==str)   {  
            opt.selected='true';  
        }   
        select.appendChild(opt);
   }
 } 

/** *创建生肖选择框 */ 
function createShengXiaoSelect(name,str) { 
    document.write("<select id='selectShengXiao'></select>");
    var select=document.getElementById("selectShengXiao"); 
    for(var i=0;i<arrayShengXiao.length;i=i+1) { 
        select.name=name;   
        var opt=document.createElement("option");  
        opt.value=arrayShengXiao; 
        opt.innerText=arrayShengXiao;  
        if(arrayShengXiao==str)   {  
            opt.selected='true';   
        }   
        select.appendChild(opt); 
   } 
} 
/** *创建学历选择框 */
function createDegreeSelect(name,str) {
    document.write("<select id='selectDegree'></select>"); 
    var select=document.getElementById("selectDegree");
    for(var i=0;i<arrayDegree.length;i=i+1) {   
        select.name=name;  
        var opt=document.createElement("option");   
        opt.value=arrayDegree;   
        opt.innerText=arrayDegree; 
        if(arrayDegree==str)   { 
            opt.selected='true';  
        }   
        select.appendChild(opt); 
    } 
} 

<SCRIPT src="createSelect.js" language="javascript"></SCRIPT> 
<script type="text/javascript">      
     createNationSelect("userNation"); 
</script> 

<script type="text/javascript">         
  createNationSelect("userNation","苗族"); </script> 

<script type="text/javascript">      
     createNationSelect("userNation","${user.userNation}");
 </script>