jQuery/JavaScript Java VBA

Here's a code for animating a paragraph using slide animation, I found this interesting.

//Code for example B
$("input.buttonBslidedown").click(function(){ $("div.contentToChange").find("p.fourthparagraph:hidden").slideDown("slow"); });
$("input.buttonBslideup").click(function(){ $("div.contentToChange").find("p.fourthparagraph:visible").slideUp("slow"); });
//show code example B
$("a.codeButtonB").click(function(){$("pre.codeB").toggle()});