HTML. , javascript-.
function gaserror(){
var distance = Number(document.cars.distance.value);
switch( $('#listofcars :selected').text())
{
case 'Volvo':
if (distance>500)
{
$.pnotify({
title: 'Error',
text: 'You have run out of gas!',
addclass: 'custom',
type: 'error',
opacity: 0.8,
nonblock: true,
nonblock_opacity: 0.2,
sticker: false,
stack: false,
mouse_reset: false,
history:false,
before_open: function(pnotify) {
pnotify.css({
"top": ($(window).height() / 2) - (pnotify.height() / 2),
"left": ($(window).width() / 2) - (pnotify.width() / 2)
});
}
});
}
break;}}