Template:Fudan China/JS/head

var $ban=$('#banner'); var sT=document.documentElement.scrollTop; $ban.css('top',0.4*sT+'px'); $ban.css('opacity',0.7-0.7*sT/200); $(document).on('scroll',function () {

   var sT=document.documentElement.scrollTop;
   if(sT<200){
       $ban.css('top',0.4*sT+'px');
       $ban.css('opacity',0.7-0.7*sT/200);
   }
   else {
       $ban.css('opacity',0);
   }

}); var $logo=$('#logo'); if(sT<200){

   $logo.css('top',0.6*sT-400+'px');

} else {

   $logo.css('top','-280px');

} $(document).on('scroll',function () {

   var sT=document.documentElement.scrollTop;
   if(sT<200){
       $logo.css('top',0.6*sT-400+'px');
   }
   else {
       $logo.css('top','-280px');
   }

});