在文本值中插入Javascript

Question

如何在我的＆＃34;价格＆＃34;中插入此javascript？文字值？这是我的代码：

＆＃13;

＆＃13;

 <script>
function myFunction() {
    var x = document.getElementById('car-select')[document.getElementById('car-select').selectedIndex].innerHTML;
    document.getElementById("demo").innerHTML =  x;
}
</script>

＆＃13;

<div class="input-group pick-up">

<span class="input-group-addon"><span class="glyphicon glyphicon-map-marker"></span>Price </span>

<input name="price" type="text" class="form-control autocomplete-location" id="price" value="">

</div>

<p id="demo"></p>
                           
                           

＆＃13;

＆＃13;

＆＃13;

Answer 1

正如MiiinimalLogic所说，只是尝试添加

document.getElementsByName("price")[0].value =  x;

如果您想在价格输入中显示x。

如果您想在价格字段更改时调用此函数，请改为使用

document.getElementsByName("price")[0].onchange=function(){

    var x = document.getElementById('car-select')[document.getElementById('car-select').selectedIndex].innerHTML;
    document.getElementById("demo").innerHTML =  x;
};