创建下拉选择框

创建下拉选择框

/**
*创建下拉选择框  yu jian
*************************
*hasValue:对应参数在数据库的值
*parametersText：option text Array
*parametersValue：option value Array
*id: select的id
*parentDom: select所在的元素
*_function: select的onChange函数
*/
var selectObj=Class.create();
selectObj.prototype = {
 initialize:function(hasValue,parametersText,parametersValue,id,parentDom){
  this.hasValue=hasValue;  
  this.parametersValue=parametersValue; 
  this.parametersText=parametersText;  
  this.id=id; 
  this.parentDom=$(parentDom);  
  this._select=document.createElement("select");
  this.parentDom.appendChild(this._select);
 },
   addEvent:function (onChangeFun) {
  this._select.onchange=onChangeFun;
 },
 isShowChoose:function(choose){
   var _option=document.createElement("option");
   _option.value='';
   if(choose!=null&&choose!='')
   _option.innerHTML=choose;
   else _option.innerHTML='请选者';
   this._select.appendChild(_option);     
 },
 showSelect:function(){
  this._select.id=this.id;
  this._select.name=this.id; 
  var oOptions=new Array(this.parametersValue.length);
  for(var i=0;i    oOptions[i]=document.createElement("option");
   oOptions[i].innerHTML=this.parametersText[i];   
   oOptions[i].value=this.parametersValue[i];  
   if(this.parametersValue[i]==this.hasValue){
    oOptions[i].selected=true;
   }
   this._select.appendChild(oOptions[i]);
  }   
 }