lastone='empty'; 
function showIt(lyr) 
{ 
if (lastone!='empty') lastone.style.display='none'; 
lastone=document.getElementById(lyr); 
lastone.style.display='block';

//reset active pic
document.getElementById('_images/cooper_pic').childNodes[0].setAttribute('id','');
document.getElementById('_images/harrington_pic').childNodes[0].setAttribute('id','');
document.getElementById('_images/heldman_pic').childNodes[0].setAttribute('id','');
document.getElementById('_images/ovens_pic').childNodes[0].setAttribute('id','');
document.getElementById('_images/peterson_pic').childNodes[0].setAttribute('id','');
document.getElementById('_images/sSmith_pic').childNodes[0].setAttribute('id','');
document.getElementById('_images/webster_pic').childNodes[0].setAttribute('id','');

//set active pic
document.getElementById(lyr + '_pic').childNodes[0].setAttribute('id',lyr +'_active');

return false;
}