js走马灯简单实例_javascript技巧

var direction ='left';
var intervalId = window.setInterval(function () {
if (direction == 'right') {
var title = document.title;
var firstchar = title.charAt(0);
var lastchar = title.substring(1, title.length);
document.title = lastchar + firstchar;
}
if (direction == 'left') {
var title = document.title;
var firstchar = title.charAt(title.length - 1);
var lastchar = title.substring(0, title.length - 1);
document.title = firstchar + lastchar;
}
}, 2000)