function new_window(myAddress,myW,myH) { 
	w = myW;
	h = myH;
	x = 100, y = 50;
	if (screen) {
		y = (screen.availHeight - h)/2 -20;
		x = (screen.availWidth - w)/2 -10;
	}
		
	newWindow = window.open(myAddress,'smssender', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width='+w+',height='+h+',top='+y+',left='+x);
	newWindow.focus();
}
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		btn1_over = newImage("http://www.smssender.net/images/btn1_over.gif");
		btn2_over = newImage("http://www.smssender.net/images/btn2_over.gif");
		btn3_over = newImage("http://www.smssender.net/images/btn3_over.gif");
		btn4_over = newImage("http://www.smssender.net/images/btn4_over.gif");
		btn5_over = newImage("http://www.smssender.net/images/btn5_over.gif");
		btn6_over = newImage("http://www.smssender.net/images/btn6_over.gif");
		btn7_over = newImage("http://www.smssender.net/images/btn7_over.gif");
		btn8_over = newImage("http://www.smssender.net/images/btn8_over.gif");
		preloadFlag = true;
	}
}

function chiedipassword_window()
{
	desktop = window.open("http://www.smssender.net/password_forgotten.asp", "richiesta_password", "toolbar=no,location=no,status=no,menubar=no,scrollbars=no,width=330,height=255,resizable=no");
	desktop.focus();
}

function ControlloForm(){
	if (login.userid.value == ""){
		alert("hai dimenticato di inserire l'userid!");
		login.userid.focus();
	}else{ 
		if (login.password.value == ""){
			alert("hai dimenticato di inserire la password!");
			login.password.focus();
		}else{
			login.submit();
		}
	}
}