var prevType;
var prevID;

var lyrDisplayed;

function toggleTab(obj, numTabs) {
	TabColorInactive = '#cccccc';
	TabColorActive = '#f07c0d'
	
	//RESET BGCOLOR
	for(i=1;i<=numTabs;i++)
	{
	  if (document.getElementById('tab' + i) != null)
	    document.getElementById('tab' + i).className='';
	}
		
	//RESET ALL DIVs AS NONE/HIDDEN
	for(i=1;i<=numTabs;i++)
	{
	  if (document.getElementById('layer' + i) != null)
	    document.getElementById('layer' + i).style.display='none';
	}
	
	
	//APPLY THE ACTIVE STYLE TO THE SELECTED TAB		
	document.getElementById('tab' + obj).className='tabNavOn';
	document.getElementById('layer' + obj).style.display='block';
	lyrDisplayed = obj;
}