用另一个输入字段值更新隐藏的输入字段值？ [英] Update hidden input field value with another input field value?

问题描述

我试图更新一个隐藏的输入字段与另一个可见的输入字段使用JavaScript ...

但我的代码不起作用的一些原因!!

这是我的javascript：

 < script language =javascript > 
 function process1（）{
 document.getElementById（sum_total）。value =（document.getElementById（my-item-price）。value）; 
} 
< / script> 
  

这是我的表单代码：

 < form>< input name =A1type =textclass =A1id =A1/>< / form> 
 
< form>< input type =hiddenid =A2name =A2value =process1（）/>< / form> 
  

更新

 < script language =javascript> 
 function process1（）{
 document.getElementById（sum_total）。value =（document.getElementById（my-item-price）。value）; 
} 
< / script> 
  

解决方案

您拥有的代码很糟糕。你还没有找到 id 你在javascript中寻找。

试试这个：

 < script language =javascript> 
函数process1（显示）{
 document.getElementById（A2）。value = displayed.value; 
} 
< / script> 
 
< form>< input name =A1type =textclass =A1onChange =process1（this）/>< / form> 
 
< form>< input type =hiddenid =A2name =A2value =5/>< / form> 
  

I am trying to update one hidden input field with another visible input field using javascript...

but my code doesn't work for some reason!!

This is my javascript:

<script language="javascript">
    function process1() {
        document.getElementById("sum_total").value = (document.getElementById("my-item-price").value);
    }
</script>

And This Is My form code:

<form><input name="A1" type="text" class="A1" id="A1"/></form>

<form><input type="hidden" id="A2" name="A2" value="process1() "/></form>

Update

<script language="javascript"> 
    function process1() { 
        document.getElementById("sum_total").value = (document.getElementById("my-item-price").value); 
    } 
</script>

解决方案

The code you have is bad. You haven´t got ids you are looking for in javascript.

Try this:

 <script language="javascript">
 function process1(showed) {
    document.getElementById("A2").value = showed.value;
}
</script>

<form><input name="A1" type="text" class="A1" onChange="process1(this)"/></form>

<form><input type="hidden" id="A2" name="A2" value="5" /></form>

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