javascript - How to animate the width of a div slowly with jquery -

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i have navigation nested in div offscreen left , when user scrolls down page , reaches pixel 296, left navigation appears it's width growing towards right.

what have half working. navigation nested in div appears when user scrolls down page want animate right , not happening. not sure doing wrong. specific line having problems is:

$("#slidebottom").animate({ width: "100" }, 'slow');

but here entire code:

$(window).scroll(function(){    var wintop = $(window).scrolltop(), docheight = $(document).height(),    winheight =    $(window).height();    var bottomheight = $("#slidebottom").height();   var zeroheight = 0;    if  (wintop > 296) {     bottomheight = $('#slidebottom').height(docheight);     $("#slidebottom").animate({ width: "100" }, 'slow');    }    if( wintop < 296)   {     bottomheight = $('#slidebottom').height(zeroheight);         //$("#slidebottom").animate({ width: "0" }, 'slow');   } });

the jquery docs show ints, not strings, arguments width:

$("#slidebottom").animate({ width: 100 }, 'slow');

edit: wrong, that's not problem; handles strings well.


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