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PHP and XML combobox autofilling

Posted on 2010-01-07
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Last Modified: 2012-05-08
Hello, i have 2 comboboxes on a page that i am filling through XML, the first one is working fine, but i can't get the second one to be populated correctly, it should be populated depending on the selection of the first combobox! is there any other way than AJAX to get this done ? ..
if not, how could i get that done using AJAX ?
below is the code i'm using.. the javascript does alert the correct value, but i can not get it into php inorder to request the data from my XML upon that value!
also, i do not want to get the page reloaded inorder to get the value throuhg GET or POST!

Thank you.. below is the code i'm using..
<form action="load.php" method="post">Select Cat<select name="categories" id="categories">
	<?php 
	$fff = '<script type="text/javascript">';
	$fff .= 'function getMainCat() {';
	$fff .= "var x = document.getElementById('categories').value;";
	$fff .= 'alert(x); }';
	$fff .= '</script>';
	?>
  </select><br /><br />Select Sub Category<select name="sub_categories" id="sub_categories" onchange="getMainCat();">

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Question by:SuW
2 Comments
 
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CSecurity earned 1000 total points
ID: 26207486
Here I coded a sample Javascript for you, create another PHP file which ONLY prints out what you want to get as Ajax output, in my sample I called it ajaxphpfile.php

That's all
function ajaxRequest(){
 var activexmodes=["Msxml2.XMLHTTP", "Microsoft.XMLHTTP"] //activeX versions to check for in IE
 if (window.ActiveXObject){ //Test for support for ActiveXObject in IE first (as XMLHttpRequest in IE7 is broken)
  for (var i=0; i<activexmodes.length; i++){
   try{
    return new ActiveXObject(activexmodes[i])
   }
   catch(e){
    //suppress error
   }
  }
 }
 else if (window.XMLHttpRequest) // if Mozilla, Safari etc
  return new XMLHttpRequest()
 else
  return false
}


function getMainCat() {
var x = document.getElementById('categories').value;
var mygetrequest=new ajaxRequest();
mygetrequest.onreadystatechange=function(){
 if (mygetrequest.readyState==4){
  if (mygetrequest.status==200 || window.location.href.indexOf("http")==-1){
   document.getElementById("result").innerHTML=mygetrequest.responseText  // HERE YOU PUT WHERE YOU WANT TO GET RESULTS
  }
  else{
   alert("An error has occured making the request");
  }
 }
}
var categories=encodeURIComponent(document.getElementById("categories").value);
mygetrequest.open("GET", "ajaxphpfile.php?categories="+categories, true)
mygetrequest.send(null)

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Author Closing Comment

by:SuW
ID: 31674414
Thank you.
0

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