How to align a button to the right of text box without margin?

     <input type="text" value="" placeholder="search text here" class="txtbox" />
     <input type="submit" value=" OK "  class="btncls" />

        .txtbox{
            display: block;
            float: left;
            height: 32px;
            width: 100px;
        }

        .btncls{
            display: block;
            float: left;
            height: 40px;
            margin: -1px -2px -2px;
            width: 41px;
        }

OR Check on Fiddle http://jsfiddle.net/Ggg2b/9/