var objTrackerCurrent = document.getElementById('tracker1');

var objTabCurrent = document.getElementById('tab1');

function trackerSwitch(intId) { 
	
	var strName = 'tracker'+intId;
	
	var objTrackerNew = document.getElementById(strName);
	
	var objTabNew = document.getElementById('tab'+intId);

	if(objTrackerCurrent==null) {
	
		objTrackerCurrent = document.getElementById('tracker1');
	
	}

	if(objTabCurrent==null) {
	
		objTabCurrent = document.getElementById('tab1');
	
	}
	
	objTrackerCurrent.style.display = 'none';
	
	objTabCurrent.className = 'dev notactive';
	
	objTabNew.className = 'dev active';
	
	objTrackerNew.style.display = 'block';
	
	objTrackerCurrent = objTrackerNew;
	
	objTabCurrent = objTabNew;

}