Difference between revisions of "Template:Fudan China/JS/head"

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Line 1: Line 1:
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var $ban=$('#banner');
 +
var sT=document.documentElement.scrollTop;
 +
$ban.css('top',0.4*sT+'px');
 +
$ban.css('opacity',1-sT/200);
 +
$(document).on('scroll',function () {
 +
    var sT=document.documentElement.scrollTop;
 +
    if(sT<200){
 +
        $ban.css('top',0.4*sT+'px');
 +
        $ban.css('opacity',1-sT/200);
 +
    }
 +
    else {
 +
        $ban.css('opacity',0);
 +
    }
 +
});

Revision as of 10:07, 28 October 2017

var $ban=$('#banner'); var sT=document.documentElement.scrollTop; $ban.css('top',0.4*sT+'px'); $ban.css('opacity',1-sT/200); $(document).on('scroll',function () { 

   var sT=document.documentElement.scrollTop;
   if(sT<200){
       $ban.css('top',0.4*sT+'px');
       $ban.css('opacity',1-sT/200);
   }
   else {
       $ban.css('opacity',0);
   }

});