function pageUp(ob){var dv=ob.parentNode.previousSibling;while(dv.nodeName!='div'&&dv.nodeName!='DIV')dv=dv.previousSibling;dv.style.display='block';ob.parentNode.style.display='none'}
function pageDown(ob){var dv=ob.parentNode.nextSibling;while(dv.nodeName!='div'&&dv.nodeName!='DIV')dv=dv.nextSibling;dv.style.display='block';ob.parentNode.style.display='none'}
function showImg(ob){document.getElementById('MainImage').src=ob.src;document.getElementById('MainName').firstChild.nodeValue=ob.alt}