function checkLIForm(f){
	if(!f.email.value||!f.e_id.value){
		alert("Please enter your E-mail and Order number and try again!");
		return false;
	} else if(f.email.value.indexOf("@")<0) {
		alert("You entered wrong E-mail address!");
		return false;
	}
	return true;
}

/*
 *	Change opacity on image
 */
var element = null;
var direciton = 'out';
var timer_id = null;
function changeOpacity()
{
	e = document.getElementById(element);
	if(direction=='over' && e.op!=100)  { e.op += 5; }
	else if(direction=='out' && e.op)  { e.op -= 5; }
	else { return; }
	if(e.style.filter)  e.style.filter = 'alpha(opacity=' + e.op + ')';
	else  e.style.opacity = e.op/100;
	timer_id = setTimeout(changeOpacity, 10);
}
function imgOpacityChange(el, dir)
{
	clearTimeout(timer_id);
	element = el;
	direction = dir;
	e = document.getElementById(element);
	if(!e.op)  e.op = 0;
	timer_id = setTimeout(changeOpacity, 10);
}