Update Sharepoint list using javascript

function CreateListItem(lstName,updateXML,wsURL,action)
{
var oXMLHttpRequest;
try
{
oXMLHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e)
{
alert("XMLHttpRequest not supported");
}


var soapEnv = '<?xml version="1.0" encoding="utf-8"?>';
soapEnv += '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ';
soapEnv += 'xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">';
soapEnv += '<soap:Body><UpdateListItems xmlns="http://schemas.microsoft.com/sharepoint/soap/">';
soapEnv += '<listName>'+lstName+'</listName><updates>'+updateXML+'</updates></UpdateListItems></soap:Body></soap:Envelope>';

oXMLHttpRequest.open("POST", wsURL, false);
oXMLHttpRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
oXMLHttpRequest.setRequestHeader("SOAPAction", action);

oXMLHttpRequest.send(soapEnv);

alert(oXMLHttpRequest.status);

}

function updateList()
{
var updateXML = stringNode= "<Batch OnError='Continue'>";
updateXML+= "<Method ID='1' Cmd='Update'>";
updateXML+= "<Field Name='ID'><![CDATA[374]]></Field>";
updateXML+= "<Field Name='Title'><![CDATA[555]]>";
updateXML+= "</Field></Method></Batch>";
CreateListItem('ListName',updateXML,'http://siteURL/_vti_bin/Lists.asmx','http://schemas.microsoft.com/sharepoint/soap/UpdateListItems');
}