function menu_link(num)
{
	switch(num)

	{

	  case 1:window.location="/articles/employment_screening/index.shtml" ;break;

	  case 2:window.location="/articles/drug_testing/index.shtml" ;break;

	  case 3:window.location="/research_center.asp" ;break;

	  case 4:window.location="/articles/announcements/index.shtml" ;break;

	}
}