function makeObject(){
	var x;
	if (window.ActiveXObject) {
		x = new ActiveXObject("Microsoft.XMLHTTP");
	}else if (window.XMLHttpRequest) {
		x = new XMLHttpRequest();
	}
	return x;
}
var request = makeObject();

//AJAX the content
var the_content;
function check_content(f){
	var formData = '', elem = ''; 
	for(var s=0; s<f.elements.length; s++){ 
		elem = f.elements[s]; 
		if(formData != ''){ 
			formData += '&'; 
		} 
		formData += elem.name+"="+elem.value; 
	}
	request.open(f.method, f.action, true);
	request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	request.onreadystatechange = parseCheck_content;
	request.send(formData);
	return false;
}
function parseCheck_content(){
	if(request.readyState == 1){
		document.getElementById('content_grab').innerHTML = '<img src="images/ajax-loader-violet.gif"><br />ricerca contatti in corso...';
	}
	if(request.readyState == 4){
		var answer = request.responseText;
		document.getElementById('content_grab').innerHTML = answer;
		$('.invito').checkbox({cls:'jquery-invito-checkbox'});
	}
}