js、checkbox

function dsubmitStory(){
????if($("#u_tag").val()?==""?||?$("#u_tag").val()?=="最少要入兩個標籤,用“,”分隔"){
????????alert("標籤不能為空!");
????????return?false;
????}else{
????????var?t?=?$("#u_tag").val().split(",");
????????if(t.length<2){	
????????????alert("請最少輸入兩個標籤！");
????????????return?false;
????????}else?if(t.length>=2&&t.length<=3){
????????????for(var?j=0;j<t.length;j++){
????????????????if(t[j].length>20){
????????????????????alert("標籤長度不能超過20!");
????????????????????return?false;
????????????????}
????????????}
????????}else?if(t.length>3){
????????????alert("最多只能輸入三個標籤!");
????????????return?false;
????????}
????????//验证通过执行
????????//document.addStory.submit();?
????}
	document.addStory.submit();?
}

<c:forEach var="p" items="${TagList}" varStatus="vs">
	                            <td  valign="top">
	                            <c:if test="${vs.index!=0}"><div class="form-ul-left"></div></c:if>
	                                <div class="form-ul-div">
	                                    <ul class="form-ul">
	                                        <li><input class="form-ul-li-input" type="checkbox" value="${p.id}" name="ftagid" id="t_${p.id}">${p.tag}</li>
	                                    </ul>
	                                </div>
	                            </td>
                            </c:forEach>

  function  validate(){