var request = null;

function createRequest(){
	// Create the XMLHttpRequest object for all browser types available
	try{
		request = new XMLHttpRequest();
	}catch (trymicrosoft){
		try{
			request = new ActiveXObject("Msxm12.XMLHTTP");
		}catch (othermicrosoft){
			try{
				request = new ActiveXObject("Microsoft.XMLHTTP");
			}catch (failed){
				request = null;
			}
		}
	}
	
	if (request == null)
		alert("Could not create request object!");
}