将URL字符串传递给Javascript函数

问题描述：

I need to pass a URL to a JavaScript function something like the following.

<script type="text/javascript" language="javascript">

var xmlhttp='';   
function ajax()
{
    if(window.XMLHttpRequest)
    {
        xmlhttp=new XMLHttpRequest();
    }
    else
    {
         xmlhttp = new ActivexObject("Microsoft.XMLHTTP");
    }
}     

function someFunction(orders_per_page, url)
{
     ajax();
     var val=document.getElementById("txt_order_amount").value; 
     xmlhttp.onreadystatechange=function()
     {
          if(xmlhttp.readyState==4 && xmlhttp.status==200)
          {                
               document.getElementById("list").innerHTML=xmlhttp.responseText;
          }
     }

     xmlhttp.open("GET",url, true);
     xmlhttp.send();        
}
</script>

<select 
    id="cmb_page" name="cmb_page" 
    onchange="someFunction(this.value, "reports/OrderAmount.php?val="+val+"&orders_per_page="+orders_per_page+"&pageNo="+getSelectedPage();">

    <option value="1">Some Value</option>
</select>

I need to pass a URL string as mentioned on the onchange even of the <select><option></option></select> element. Is it possible?

我需要将URL传递给JavaScript函数，如下所示。 p>

 ＆lt; script type =“text / javascript”language =“javascript”＆gt; 
 
var xmlhttp ='';  
 
函数ajax（）
 {
 if if（window.XMLHttpRequest）
 {
 xmlhttp = new XMLHttpRequest（）; 
} 
 else 
 {
 xmlhttp = new ActivexObject（“Microsoft.XMLHTTP”）  ; 
} 
 
函数someFunction（orders_per_page，url）
 {
 ajax（）; 
 var val = document.getElementById（“txt_order_amount”）。value;  
 xmlhttp.onreadystatechange = function（）
 {
 if if（xmlhttp.readyState == 4＆amp;＆amp; xmlhttp.status == 200）
 {
 document.getElementById（“list”）。innerHTML = xmlhttp  .responseText; 
} 
} 
 
 xmlhttp.open（“GET”，url，true）; 
 xmlhttp.send（）;  
} 
＆lt; / script＆gt; 
 
＆lt; select 
 id =“cmb_page”name =“cmb_page”
 onchange =“someFunction（this.value，”reports / OrderAmount.php？val =“+ val +  “＆amp; orders_per_page =”+ orders_per_page +“＆amp; pageNo =”+ getSelectedPage（）;“＆gt; 
 
＆lt; option value =”1“＆gt;某些值＆lt; / option＆gt; 
＆lt; / select＆gt; 
   code>  pre> 
 
 我需要传递 onchange  code>上提到的URL字符串，即使是＆lt; select＆gt;＆lt; option＆gt;＆lt;  / option＆gt;＆lt; / select＆gt;  code>元素。是否可以？ p> 
  div>

答

try this

onchange="someFunction(this.value, 'reports/OrderAmount.php?val='+val+'&orders_per_page='+orders_per_page+'&pageNo='+getSelectedPage());"

Note: I have replaced double quotes with single quotes

答

You can also break your code a little bit to prevent as much tag soup.

I assume your val var is defined and in the global scope:

onchange="someFunction(this.value)"

function someFunction(orders_per_page) {
    var url = "reports/OrderAmount.php?val="+val+"&orders_per_page="+orders_per_page+"&pageNo="+getSelectedPage();
    ajax(); // ... rest of your function

Make sure getSelectedPage() is returning a string, or a number which can be parsed as string.

将URL字符串传递给Javascript函数

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