select标签 selected 选中状态动态设置

方法1：

证件类型:
<select id="zj">
    <option value="">
        所有
    </option>
    <option value="IDCARD"
        <c:if test="${requestScope.certidType=='IDCARD'}">selected="true"</c:if>>
        身份证
    </option>
    <option value="PASSPORT"
        <c:if test="${requestScope.certidType=='PASSPORT'}">selected="true"</c:if>>
        护照
    </option>
</select>

 方法2：

window.onload=function(){
 			var userType='${userType}';
 			if(userType == '1') {
 				var code='${code}';
 				var QState='${QState}';
	 			var selectCode=document.getElementById("code");
	 			var selectQState=document.getElementById("QState");
	 			if(selectCode.length>0){
	   			for(var i=0;i<selectCode.options.length;i++){
	       			if(selectCode.options[i].value==code){
	          			selectCode.options[i].selected=true;
	          			break;
	       			}
	   			}
	 			}
	 			if(selectQState.length>0){
	   			for(var i=0;i<selectQState.options.length;i++){
	       			if(selectQState.options[i].value==QState){
	          			selectQState.options[i].selected=true;
	          			break;
	       			}
	   			}
	 			}
 			}
}