Stimulate

console.log(jQuery('select[multiple="multiple"]').val());

$.ajax({
url: "test.php", 
type: 'get',
success: function(result){
    alert(123);
},
error: function(){
    alert('timeout');
},
 timeout: 3000
});

var htmlElement= document.querySelector('html');
console.log(htmlElement.dataset.skin);

$(this).closest('ul.parent').addClass('new_class');

$('.wrap').click(function(){
  $(this).toggleClass('open');
});

var trouble = prompt('What is wrong?');

switch (trouble) {
	case 1:
		console.log('check your cabel');
    break;
	
	case 2:
		console.log('check your router');
    break;
	
	case 3:
		console.log('reload your PC');
    break;
	
	default:
		console.log('uncorrect trouble');
	break;
}