/* Wrapper function for constructing a Request object.
Parameters:
reqType: The HTTP request type such as GET or POST.
url: The URL of the server program.
asynch: Whether to send the request asynchronously or not. */
function httpRequest(reqType,url,asynch){
//Mozilla-based browsers
if(window.XMLHttpRequest){
request = new XMLHttpRequest();
} else if (window.ActiveXObject){
request=new ActiveXObject("Msxml2.XMLHTTP");
if (! request){
request=new ActiveXObject("Microsoft.XMLHTTP");
}
}
//the request could still be null if neither ActiveXObject
//initializations succeeded
if(request){
initReq(reqType,url,asynch);
} else {
alert("Your browser does not permit the use of all "+
"of this application's features!");}
}