重新載入js的方法

var head = $("head").remove("script[role='reload']");
			$("<scri" + "pt>" + "</scr" + "ipt>").attr({ role: 'reload', src: getRootPath()+"/js/video.js", type: 'text/javascript' }).appendTo(head);

var link = document.createElement("link");
link.rel = "stylesheet";
link.type = "text/css";
link.href = getRootPath()+"/css/video.css";
document.getElementsByTagName("head")[0].appendChild(link);