An Ajax class _ajax related

Program code:
<script type= "Text/javascript" >
function Ajax (surl,srecvtyp,squerystring,oresultfunc) {
This. URL = sURL;
This. QueryString = squerystring;
This. XmlHttp = This.createxmlhttprequest ();
if (this. XmlHttp = = null) {
Alert ("Erro");
Return
}
var objxml = this. XmlHttp;
Objxml.onreadystatechange = function () {Ajax.handlestatechange (Objxml,srecvtyp,oresultfunc)};
}

Ajax.prototype.createXMLHttpRequest = function () {
try {return new ActiveXObject ("Msxml2.xmlhttp");} catch (e) {}
try {return new ActiveXObject ("Microsoft.XMLHTTP");} catch (e) {}
try {return new XMLHttpRequest ();} catch (e) {}
return null;
}

Ajax.prototype.createQueryString = function () {
var querystring = this. QueryString;
return querystring;
}

Ajax.prototype.get = function () {
sURL = this. URL;
var querystring = surl+ "? timestamp=" + New Date (). GetTime () + "&" + this.createquerystring ();
This. Xmlhttp.open ("Get", querystring,true);
This. Xmlhttp.send (NULL);
}

Ajax.prototype.post = function () {
sURL = this. URL;
var surl = sURL + "? timestamp=" + New Date (). GetTime ();
var querystring = this.createquerystring ();
This. Xmlhttp.open ("POST", surl,true);
This. Xmlhttp.setrequestheader ("Content-type", "application/x-www-form-urlencoded");
This. Xmlhttp.send (querystring);
}

Ajax.handlestatechange = function (Xmlhttp,srecvtyp,oresultfunc) {
if (xmlhttp.readystate = = 4) {
if (Xmlhttp.status = = 200) {
Oresultfunc (Srecvtyp?) XmlHttp.responseXML:XmlHttp.responseText);
} else {
Alert ("The page you are requesting has an exception.) ");
}
}
}
</script>



How to use:
<script type= "Text/javascript" >
var classajax = new Ajax (SURL,SRECVTYP,SQUERYSTRING,ORESULTFUNC);
Classajax.post (); Send data in//post mode
Classajax.get (); Send data in//get mode
sURL Send Address
Srecvtyp Accept Data type: 0 is XML 1 is text
Oresultfunc return result handler function
</script>

application Example:
<script type= "Text/javascript" >
var ajax1 = new Ajax ("1.asp", 0, "id=" +id,bacal);
Ajax1.post ();
function Bacal (REXM) {
Returns the data processing function;
}
</script>