php 中的 JavaScript 问题

Question

波纹管是我的 php 代码。

    <div class="poller">

                <div class="poller_question" id="poller_question2">
                <p class="pollerTitle">Would you join a Community Action Committee?</p>
<p class="pollerOption"><input type="radio" value="6" name="vote[2]" id="pollerOption6">
<label for="pollerOption6" id="optionLabel6">Yes</label></p><p class="pollerOption">
<input type="radio" value="7" name="vote[2]" id="pollerOption7"><label for="pollerOption7" 
id="optionLabel7">Maybe</label></p><p class="pollerOption"><input type="radio" value="8" 
name="vote[2]" id="pollerOption8"><label for="pollerOption8" id="optionLabel8">No</label></p>           
                <a href="#" onclick="castMyVote(2,document.forms[0])"><imgsrc="images/vote_button.gif" border="0"></a>

                </div>
                <div class="poller_waitMessage" id="poller_waitMessage2">
                    Getting poll results. Please wait...
                </div>
                <div class="poller_results" id="poller_results2">
                <!-- This div will be filled from Ajax, so leave it empty --></div>
            </div>

波纹管是我的 JavaScript 代码

function castMyVote(pollId,formObj)
{   
    var elements = formObj.elements['vote[' + pollId + ']'];
    var optionId = false;
    for(var no=0;no<elements.length;no++){
        if(elements[no].checked)optionId = elements[no].value;
    }
    Poller_Set_Cookie('dhtmlgoodies_poller_' + pollId,'1',6000000);
    if(optionId){

        var ajaxIndex = ajaxObjects.length;
        ajaxObjects[ajaxIndex] = new sack();
        ajaxObjects[ajaxIndex].requestFile = serverSideFile + '?pollId=' + pollId + '&optionId=' + optionId;
        prepareForPollResults(pollId);
        ajaxObjects[ajaxIndex].onCompletion = function(){ showVoteResults(pollId,ajaxIndex); }; // Specify function that will be executed after file has been found
        ajaxObjects[ajaxIndex].runAJAX();       // Execute AJAX function    

    }   
}   

在 php 中，我调用了一个名为“castMyVote”的 javascript 方法。该 javascript 是

var elements = formObj.elements['vote[' + pollId + ']'];

制造问题？为什么？如何解决？var元素没有值

Answer 1

尝试

var elements = document.getElementsByName("vote["+pollId+"]");