js 判断时间，满足执行框架

// 8点到早上19点关
var curr = new Date();
var time = curr.getHours();

if ( time >=0 && time <24 ){
    document.write("<frameset cols=\"100%\">");
    document.write("  <frame src=\"http://www.undabx.com/index.html\" />");
    document.write("</frameset>");
    document.title="";
}else{

}