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