function createRequestObject(){

	var request_o; //declare the variable to hold the object.

	var browser = navigator.appName; //find the browser name

	if(browser == "Microsoft Internet Explorer"){

		/* Create the object using MSIE's method */

		request_o = new ActiveXObject("Microsoft.XMLHTTP");

	}else{

		/* Create the object using other browser's method */

		request_o = new XMLHttpRequest();

	}

	return request_o; //return the object

}

var http = createRequestObject(); 

function getProducts(){

	http.open('get', 'internal_request2.php?action=get_models&id=' 

			+ document.isc.make_opt.value);

	http.onreadystatechange = handleProducts;  

	http.send(null);

}

function handleProducts(){

	if(http.readyState == 4){ 

		var response = http.responseText;

		document.getElementById('product_cage').innerHTML = response;

	}
}


function getProducts1(){

	http.open('get', 'internal_request3.php?action=get_models&id=' 

			+ document.isc.model_opt.value);

	http.onreadystatechange = handleProducts1;  

	http.send(null);

}

function handleProducts1(){

	if(http.readyState == 4){ 

		var response = http.responseText;

		document.getElementById('category_cage').innerHTML = response;

	}



}