在 HTML 中隐藏复选框

我有这两个复选框：

<label for="cell">3. Do you currently have a cell phone? (Y/N)</label>
<input type="checkbox" name="cell" name="cell" id="cell" data-on="Yes" data-off="No" />

<label for="blackBerry">4.If YES, is the cell phone a BlackBerry? (Y/N)</label>
<input type="checkbox" name="blackBerry" name="blackBerry" id= "blackBerry" data-on="Yes" data-off="No" />

仅当第一个问题选择“是”时，如何才能让第二个问题显示在页面上？

提前致谢。

您可以使用 JavaScript 来完成此操作

JavaScript

​var elem = ​document.getElementById('cell');

​elem.addEventListener('click', function() {
      var divElem = document.getElementById('divPhone'); 
    if( this.checked){
        divElem.style.display = 'block'  ; 
    }
    else{
        divElem.style.display = 'none'  ;
    }
});

HTML

   <label for="cell">3. Do you currently have a cell phone? (Y/N)</label>
    <input type="checkbox" name="cell" name="cell"
           id="cell" data-on="Yes" data-off="No" />

    <div id="divPhone" class="hidden">
      <label for="blackBerry">4.If YES, is the cell phone a BlackBerry?
                                                          (Y/N)</label>
      <input type="checkbox" name="blackBerry" name="blackBerry" 
            id= "blackBerry" data-on="Yes" data-off="No" />
    </div>

​.hidden 
{
    display: none;
}​

检查小提琴 http://jsfiddle.net/sushanth009/999y9/

​使用 jQuery 还是更简单..

​$('#cell').on('click', function() {
    if(this.checked){
       $('#divPhone').removeClass('hidden');
    }
    else{
       $('#divPhone').addClass('hidden');
    }        
});​

jQuery 小提琴 http://jsfiddle.net/sushanth009/jcHUF/