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/* -----------------------------------------------------------------------------
file: ajax.js
file version: 1.1.0
date: 2008-05-25
------------------------------------------------------------------------------
author: grum at grum.dnsalias.com
<< May the Little SpaceFrog be with you >>
------------------------------------------------------------------------------
this classes provides base functions to add ajax into html page
+ create_httpobject provide a simple function to create an HTML request to a
server ; return an XMLHttpRequest object (or compatible object for IE)
+ tHttpObject is a class providing :
- an XMLHttpRequest object
-
------------------------------------------------------------------------------
HISTORY VERSION
v1.0.1 + [create_httpobject] overrideMimeType unknown by IE 7.0 ;
v1.1.0 + add create_httpobject2 with mimetype parameter
-------------------------------------------------------------------------- */
function create_httpobject(requesttype, charset, ajaxurl, async)
{
return(create_httpobject2(requesttype, charset, ajaxurl, async, ''));
}
function create_httpobject2(requesttype, charset, ajaxurl, async, mimetype)
{
if (window.XMLHttpRequest)
{
// IE7 & FF method
http_request = new XMLHttpRequest();
}
else
{
//Other IE method.....
if (window.ActiveXObject)
{
try
{
http_request = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
http_request = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
window.alert("Your browser is unable to use XMLHTTPRequest");
} // try-catch
} // try-catch
}
} // if-else
if(charset=='') { charset='utf-8'; }
http_request.onreadystatechange = function() { };
http_request.open(requesttype.toUpperCase(), ajaxurl, async);
if(mimetype=='')
{
mimetype='text/html';
}
try
{
http_request.overrideMimeType(mimetype+'; charset='+charset);
}
catch(e)
{
}
if(requesttype.toUpperCase()=='POST')
{
http_request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
}
//method to restitute an XML object ; needed for compatibility between FF&IE
http_request.XML = httpobject_responseXML;
return(http_request);
}
function httpobject_responseXML()
{
if (document.implementation && document.implementation.createDocument)
{
//ff method
return(this.responseXML);
}
else
{
//ie method
return(xmlCreateFromString(this.responseText));
}
}
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