// toggle visibility 

function toggle( targetId,itemNo,ref ){
	
  if (document.getElementById){
	  
	  for ( var i=1; i<=itemNo; i++){
  		var target = document.getElementById( targetId + i );
		var myRef = document.getElementById( ref );
		
  			if (target.style.display == "none"){
  				target.style.display = "";
				myRef.className = "selected";
  			} else {
  				target.style.display = "none";
				myRef.className = "deselected";
  			}
	}
  }
}