jquery - Slide in menu creating horizontal scroll bar -

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i've got issue slide-in menu. can view example here: http://jsfiddle.net/flobar/z62t2/

the problem when menu hidden, creates horizontal scroll bar. how prevent that?

html:

<div id="slidein">     <ul>         <li>home</li>         <li>about</li>         <li>contact</li>     </ul> </div>

css:

#slidein {     background:red;     width: 200px;     float: right;     margin-right: -180px; }

js:

var menu = 0;  $('#slidein').click(function() {     if (menu == 0) {         menu = 1;         $(this).animate(             {marginright: '0px'},200         );     } else {         menu = 0;         $(this).animate(             {marginright: '-180px'},200         );     } });

the way have it, need include overflow:hidden; on wrapper.

see fiddle: http://jsfiddle.net/z62t2/5/

body {     overflow-x:hidden;     width:100%; }

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