var sd = document.getElementById('seedetails');
sd.setAttribute('onmouseover', 'this.src="/images/seedetails2.gif"');
sd.setAttribute('onmouseout', 'this.src="/images/seedetails.gif"');

var ss = document.getElementById('seesamples');
ss.setAttribute('onmouseover', 'this.src="/images/seesamples2.gif"');
ss.setAttribute('onmouseout', 'this.src="/images/seesamples.gif"');