OkhunTursunov,
readme.txt
String number one
String number two
String number three
javascript
(function(){
	var p = window.location.search.match(/^\?page=([1-9][0-9]*)/);
	if (p) {
		var q = new XMLHttpRequest();
		q.open('GET', 'readme.txt', true);
		q.onreadystatechange = function() {
			if (this.readyState == 4 && this.status == 200) {
				var a = this.responseText.split(/[\n\r]+/)[p[1] - 1];
				if (a) {
					alert('String ' + p[1] + ' = ' + a);
				} else {
					alert('String ' + p[1] + ' does not exist');
				}
			}
		}
		q.send(null);
	}
})();