//handle the Ajax response ...
function handleResponse(transport)
{
    $('image').innerHTML = transport.responseText;
}

//creates a prototype Ajax object, sends a request, and registers the callback function 'handleResponse'
function callAjax(s) 
{
    var url = getUrl(); 
	var myAjax = new Ajax.Request('index/get-image', 
                                   {	method: 'get', 
										parameters: {'url': url}, 
										onLoading: loadpic(),
										onComplete: function(transport){
											handleResponse(transport);
											rebond();
										}
                                   	});
}
function loadpic(){
	$('image').innerHTML = "<img src=\"public/images/loading.gif\" id=\"loader\" \>";
}
function getUrl(){
	var url = document.getElementById('url_image').value;
	return url;
}