javascript - How can I add 10px to a div's left coordinate? -

i wondering how can add 10px div's current left position. here code:

  <div id="ok" style="width:56px; height:56px; background:blue; color:white; position:absolute; top:5px; left:5px; z-index:8;">hello</div>

i want add 10px left of position absolute div using javascript, code this. here code:

  <div id="ok" style="width:56px; height:56px; background:blue; color:white; position:absolute; top:5px; left:15px; z-index:8;">hello</div>

how can add 10 left of div using javascript?

in jquery rather easy using callback function second argument of css method:

$('#ok').css('left', function(i, val) {     return parseint(val, 10) + 10; });

demo: http://jsfiddle.net/z6j8a/

My