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'); }
});