解决location.reload IE9不能重新刷新
window.location.href = window.location.href + (window.location.href.indexOf('?') >= 0 ? '&' : '?') + 'rnd=' + Math.random()
window.location.href = window.location.href + (window.location.href.indexOf('?') >= 0 ? '&' : '?') + 'rnd=' + Math.random()