Template:Tsinghua-A/JS/fixed

$(function () {

       var ie6 = /msie 6/i.test(navigator.userAgent)
       , dv = $('#fh5co-header-section'), st;
       dv.attr('otop', dv.offset().top); //存储原来的距离顶部的距离
       $(window).scroll(function () {
           st = Math.max(document.body.scrollTop || document.documentElement.scrollTop);
           if (st >= parseInt(dv.attr('otop'))) {
               if (ie6) {//IE6不支持fixed属性，所以只能靠设置position为absolute和top实现此效果
                   dv.css({ position: 'absolute', top: st });
               }
               else if (dv.css('position') != 'fixed') dv.css({ 'position': 'fixed', top: 0 });
           } else if (dv.css('position') != 'static') dv.css({ 'position': 'static' });
       });
   });

// JavaScript Document