function Showlogin(city) {
	
	//alert(city);
    // Create new JsHttpRequest object.
    var req = new JsHttpRequest();
    // Code automatically called on load finishing.
    req.onreadystatechange = function() {
        if (req.readyState == 4) {

		  var response = req.responseText;
		  
	      document.getElementById("log").innerHTML = response;
        }
    }
    // Prepare request object (automatically choose GET or POST).
    req.open(null, 'login.php', true);
    // Send data to backend.
    req.send( { city: city  }  );
}