/*
if(window == window.top)
top.location.href = "./";
*/

function showTab(tabName,thisTabID){
	if(visibleTabName){
  	changeImg(visibleTabName,'images/'+visibleTabName+'_off.gif');
		hideDiv(visibleTabID);
  }
 	changeImg(tabName,'images/'+tabName+'_on.gif');
  visibleTabName = tabName;
  displayDiv(thisTabID);
  visibleTabID = thisTabID;
}

function displayDiv(divID){
	if(document.getElementById(divID)){
		document.getElementById(divID).style.display = 'block' ;
	}
}
function hideDiv(divID){
	if(document.getElementById(divID)){
		document.getElementById(divID).style.display = 'none' ;
	}
}
function toggleDisplay(divID){
	var thisDiv = document.getElementById(divID);
	(thisDiv.style.display == 'none') ? displayDiv(divID) : hideDiv(divID) ;
}
function changeImg(imgName,newSrc){
	if(document.images[imgName]){
		document.images[imgName].src = newSrc;
  }
}