//Create a boolean variable to check for a valid Internet Explorer instance.
var ajax = false;
//Check if we are using IE.
try {
	//If the Javascript version is greater than 5.
	ajax = new ActiveXObject("Msxml2.XMLHTTP");
	// alert ("You are using Microsoft Internet Explorer.");
} catch (e) {
	//If not, then use the older active x object.
	try {
		//If we are using Internet Explorer.
		ajax = new ActiveXObject("Microsoft.XMLHTTP");
		// alert ("You are using Microsoft Internet Explorer");
	} catch (E) {
		//Else we must be using a non-IE browser.
		ajax = false;
	}
}
//If we are using a non-IE browser, create a javascript instance of the object.
if (!ajax && typeof XMLHttpRequest != 'undefined') {
	ajax = new XMLHttpRequest();
	// alert ("You are not using Microsoft Internet Explorer");
}