onchange事件的选择框 [英] onchange event of select box

问题描述

我使用selectbox从数据库中显示enterpirses的列表。但onchange事件不会触发。但是当我手动一次把查询字符串的值，然后开始工作。我不明白为什么会发生这种情况。

我是新来的javascript和php，请告诉我解决方案。

 < select id =enterpriseboxonchange =javascript：valueselect（）> 
< option value = - >  - < / option> 
 
<？php foreach（$ enterprise as $ val）{？> 
< option value =<？php echo $ val ['customer_id'];？>><？php echo $ val ['customer_name']？> 
< / option> 
 <？ }？> 
 
< / select> 
  

和我的javascript是 -

  function valueselect（）
 {
 var i = document.getElementById（'enterprisebox'）; 
 var p = i.options [i.selectedIndex] .value; 
 // alert（p）; 
 window.location.href =channelinformation.html？selected =+ p; 
 
  

解决方案

onchange =javascript：valueselect（）用替换onchange =valueselect（this.value）;

 函数valueselect（myval）
 {
 window.location.href =channelinformation.html？selected =+ myaval; 
} 
  

您可以直接使用

  onchange =window.location ='channelinformation.html？selected ='+ myaval
  

I am using a selectbox to display the list of "enterpirses" from the database. But the onchange event is not triggering. But when i manually once put the value of querystring then it starts working. I dont understand why it is happening.

I am new to javascript and php, kindly suggest me the solution to this.

<select id="enterprisebox" onchange="javascript:valueselect()" >
    <option value="-">-</option>

    <?php foreach($enterprise as $val) { ?>
    <option value="<?php echo $val['customer_id'];?>"><?php echo $val['customer_name']?>
    </option>
    <? } ?>

</select>

and my javascript is--

function valueselect()
{
    var i = document.getElementById('enterprisebox');
    var p = i.options[i.selectedIndex].value;
    //alert(p);
    window.location.href = "channelinformation.html?selected="+p;
}

解决方案

onchange="javascript:valueselect()" replace with onchange="valueselect(this.value);"

function valueselect(myval)
{
      window.location.href = "channelinformation.html?selected="+myaval;
}

You Can Use Directly

onchange="window.location='channelinformation.html?selected='+myaval"

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