/*
# this script is used by products.php, product_details.php to update the current region then refresh the page
*/

// create request object
function createXMLHttpRequest() {
	
    var ua;
	
    if(window.XMLHttpRequest) {
        try {
            ua = new XMLHttpRequest();
        } catch(e) {
            ua = false;
        }
      } else if(window.ActiveXObject) {
        try {
           ua = new ActiveXObject("Microsoft.XMLHTTP");
        } catch(e) {
           ua = false;
        }
    }
    return ua;
}
	
var req = createXMLHttpRequest();

// handle response, populate fields with event info
function handleResponse() {
	
    if(req.readyState == 4){
        var response = req.responseText;
		// if update successful
        if(response == 'region updated') {	
			// refresh page to load new prices for this region
			window.location.reload(true); 
        }
    }
}

// called by drop down menu to update current region
function updateRegion(region) {
	
	// make sure that ajax request object is support by browser
	if(req){
		req.open("post", 'region/region_control.php', true);
		req.onreadystatechange = handleResponse; 
		req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		req.send('curr_region=' + escape(region));
	
	// request object not supported (for example IE(mac)) so set via redirect with querystring
	} else {
	//	window.location.href = '?set_region=' + region; 
		alert("Sorry, it looks as if you are using an outdated browser. \n\nPlease upgrade to a recent version of Safari (for Mac), Firefox or Internet Explorer (for Windows) to insure full compatibility with our website.");
	}
}