function setStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function determineStyleSheet(){

	var currentTime = new Date();
	var hours = currentTime.getHours();
	var minutes = currentTime.getMinutes();
	
	var TOD 
	
	if (hours < 5){
		TOD = "night";
	}
	else if ( (hours >= 5) && (hours < 9) ){
		TOD = "dawn";
	}
	else if ( (hours >= 9) && (hours < 18) ){
		TOD = "day";
	}
	else if ( (hours >= 18) && (hours < 22) ){
		TOD = "dusk";
	}
	else if (hours >= 22) {
		TOD = "night";
	}
	
	delete currentTime;
	
	return(TOD);
}

function clockDisplay(){
	
	var currentTime = new Date();
	var hours = currentTime.getHours();
	var minutes = currentTime.getMinutes();	
	
	if (minutes < 10){
		minutes = "0" + minutes;
	}
			
	if (hours < 12){
		minutes = minutes + " am";
	}
	else{
		minutes = minutes + " pm";
	}
	
	if (hours > 12){
		hours = hours - 12;
	}
	
	if (hours < 1){
		hours = 12;
	}
	
	if (hours < 10){
		hours = "0" + hours;
	}
	
	delete currentTime;
	
	return(hours + ":" + minutes + " ");	
	 
}
	
function displayStyleInfo(){
	var styleTitle = determineStyleSheet();
	var styleInfo = document.getElementById('styleInfo')
	outputString = styleInfo.innerHTML + " (" + styleTitle + ")" ;		
	styleInfo.innerHTML = outputString;
	displayTime();
}

function displayTime(){
	var clockOutput = clockDisplay();
	document.getElementById("clockDisplay").innerHTML = clockOutput;
}

var title = determineStyleSheet();
setStyleSheet(title);