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06.25.2008 at 06:22AM PDT, ID: 23514332
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9.2

Comboboxes cascading actions

Asked by s2000_com in Asynchronous Javascript and XML (AJAX), PHP Scripting Language

Tags: ,

Hi,

Using IE or FF, I've attached some code which work only with the first combobox but NOT with the 2nd in cascade.

Any suggestions ?

Thanks,

PhilStart Free Trial 
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HTML/PHP Main Script (index.php)
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script src="selectinfo.js"></script>
</head>
<body><form name="info"> 
Select an item :
<select name="infomain" onchange="showinfo1()">
<option value="1">Test 1</option>
<option value="2">Test 2</option>
<option value="3">Test 3</option>
</select>
</form>
 
Info 1 :
<div id="divinfo1">
<select id="info1"  onchange="showinfo2()">
<option value="XXX">XXXXXX</option>
</select>
</div>
<br>
Info 2 :
<div id="divinfo2">
<select id="info2">
<option value="XXX">XXXXXX</option>
</select>
</div>
 
</body>
</html> 
----------------------------------------------------------------
Javascript (selectinfo.js)
 
var xmlHttp
 
function showinfo1()
{ 
	ucxmlHttp("getinfo1.php?q="+ document.info.infomain.value, "divinfo1");
	setTimeout("showinfo2()",1000);
}
 
function showinfo2()
{ 
	ucxmlHttp("getinfo2.php?q="+ document.info.info1.value, "divinfo2")
}
 
function ucxmlHttp(url, divid)
{ 
	xmlHttp = GetXmlHttpObject();
 
	if (xmlHttp==null)
	{
 		alert ("Http Error");
 		return
 	}
	
	url=url+"&sid="+Math.random();
 
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange = function(foo)
								 { return function()
										{
											if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
											{ 
													document.getElementById(divid).innerHTML=xmlHttp.responseText 
											} 
										}
								 }(divid)
 
	xmlHttp.send(null);
}
 
function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
 	{
 		// Firefox, Opera 8.0+, Safari
 		xmlHttp=new XMLHttpRequest();
 	}
	catch (e)
 	{
 		//Internet Explorer
 		try
  		{
  			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  		}
 		catch (e)
  		{
  			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  		}
 	}
 
	return xmlHttp;
}
----------------------------------------------------------------
PHP getinfo1.php
 
<?php
$q=$_GET["q"];
 
echo "<select id='info1' onchange='showinfo2()'>";
 
echo "<option value='1'>Info ".$q.".1</option>";
echo "<option value='2'>Info ".$q.".2</option>";
echo "<option value='3'>Info ".$q.".3</option>";
 
echo "</select>";
 
?>
 
----------------------------------------------------------------
PHP getinfo2.php
 
<?php
$q=$_GET["q"];
 
echo "<select id='info2'>";
 
echo "<option value='1'>Info ".$q.".2.1</option>";
echo "<option value='2'>Info ".$q.".2.2</option>";
echo "<option value='3'>Info ".$q.".2.3</option>";
 
echo "</select>";
?>
[+][-]06.25.2008 at 10:09AM PDT, ID: 21867772

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[+][-]06.25.2008 at 11:15AM PDT, ID: 21868365

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[+][-]06.25.2008 at 11:56AM PDT, ID: 21868762

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About this solution

Zones: Asynchronous Javascript and XML (AJAX), PHP Scripting Language
Tags: ajax, IE
Sign Up Now!
Solution Provided By: hielo
Participating Experts: 1
Solution Grade: A
 
 
[+][-]06.25.2008 at 12:57PM PDT, ID: 21869290

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[+][-]06.25.2008 at 02:22PM PDT, ID: 21869985

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 7-day free trial to view this Author Comment or ask the Experts your question.

 
 
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