// displays the desired category
var nameArray = new Array("mag","met","cer");

function viewCat(Name)
{
 document.getElementById(Name+"link").blur();					/* improves aesthetics and dimishes distraction! */

 for (i in nameArray)
  document.getElementById(nameArray[i]).style.display="none";	/* firstly, hide all, then show what must be shown */

 document.getElementById("toothpick").style.display="none";
 document.getElementById(Name).style.display="block";
 createMenu("?"+Name);
}