当选择选择选项时，javascript显示隐藏的div

尝试这个：

function showDiv(divId, element){    document.getElementById(divId).style.display = element.value == 1 ? 'block' : 'none';}#hidden_div {    display: none;}<select id="test" name="form_select" onchange="showDiv('hidden_div', this)">   <option value="0">No</option>   <option value="1">Yes</option></select><div id="hidden_div">This is a hidden div</div>