// toggle visibility 
function toggleVis( targetId ){
  	if (document.getElementById) {
 		 target = document.getElementById( targetId );
 			 if (target.style.visibility == "hidden") {
  				target.style.visibility = "";
 			} else {
  				target.style.visibility = "hidden";
	  	}
  	}
}

// toggle display
function toggleDis( targetId ){
  	if (document.getElementById) {
 		 target = document.getElementById( targetId );
 			 if (target.style.display == "none") {
  				target.style.display = "";
 			} else {
  				target.style.display = "none";
	  	}
  	}
}