Template:Fudan China/JS/head

var $ban=$('#banner'); var sT=document.documentElement.scrollTop; $ban.css('top',-0.6*sT+'px'); $ban.css('opacity',0.4-0.4*sT/200); $(document).on('scroll',function () {

   var sT=document.documentElement.scrollTop;
   if(sT<200){
       $ban.css('top',-0.6*sT+'px');
       $ban.css('opacity',0.4-0.4*sT/200);
   }
   else {
       $ban.css('opacity',0);
   }

}); var $logo=$('#logo'); if(sT<400){

   $logo.css('top',0.5*sT+250+'px');

} else {

   $logo.css('top','450px');

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

   var sT=document.documentElement.scrollTop;
   if(sT<400){
       $logo.css('top',0.5*sT+250+'px');
   }
   else {
       $logo.css('top','450px');
   }

});