Essential AJAX Functions

Okay here are a couple of really usefull javascript functions when it come to ajax. Though having recently decoverd jquery I may use a little less now:

This one is cross browser and will retrive and xmldoc from a given url:


function loadXMLDoc(url) {
req = false;
// branch for native XMLHttpRequest object
if(window.XMLHttpRequest) {
try {
req = new XMLHttpRequest();
} catch(e) {
req = false;
}
// branch for IE/Windows ActiveX version
} else if(window.ActiveXObject) {
try {
req = new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
req = new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
req = false;
}
}
}
if(req) {
req.open("GET", url, false);
req.send("");
}
return req.responseXML
}


This will send a doucment to a url and return a textstring responce:


function sendXMLDoc(url,doc) {
req = false;
// branch for native XMLHttpRequest object
if(window.XMLHttpRequest) {
try {
req = new XMLHttpRequest();
} catch(e) {
req = false;
}
// branch for IE/Windows ActiveX version
} else if(window.ActiveXObject) {
try {
req = new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
req = new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
req = false;
}
}
}
if(req) {
req.open("POST", url, false);
req.send(doc);
}
return req.responseText
}


Note: I can’t remember where these came from I don’t remember writing them.
So, if you think you did and you would like me to credit or remove please let me know.

This entry was posted on Wednesday, September 17th, 2008 at 4:14 pm and is filed under Programing. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.