') } var curpart=0 function getElementbyClass(classname){ partscollect=new Array() var inc=0 var alltags=document.all? document.all : document.getElementsByTagName("*") for (i=0; i0)? curpart-1 : partscollect.length-1 partscollect[curpart].style.display="block" updatenav() } function updatenav(){ do...