////////////////////////////////////////
// FP 10/2001
// background fade function
////////////////////////////////////////
var numSteps=0;
var startingRed=0;
var startingGreen=0;
var startingBlue=0;
var endingRed=0;
var endingGreen=0;
var endingBlue=0;
var deltaRed=0;
var deltaGreen=0;
var deltaBlue=0;
var currentRed=0;
var currentGreen=0;
var currentBlue=0;
var currentStep=0;
var timerID=0;

////////////////////////////////////////
// fade timer
////////////////////////////////////////
function startFadeDec(startR, startG, startB, 
   endR, endG, endB, nSteps)
{

  	currentRed=startingRed=parseInt(startR, 10);
  	currentGreen=startingGreen=parseInt(startG, 10);
  	currentBlue=startingBlue=parseInt(startB, 10);
  	endingRed=parseInt(endR, 10);
  	endingGreen=parseInt(endG, 10);
  	endingBlue=parseInt(endB, 10);
  	numSteps=parseInt(nSteps, 10);
  	deltaRed=(endingRed-startingRed)/numSteps;
  	deltaGreen=(endingGreen-startingGreen)/numSteps;
	deltaBlue=(endingBlue-startingBlue)/numSteps;
	currentStep=0;
	
  	fade();
}
  
////////////////////////////////////////
// fade timer
////////////////////////////////////////
function fade()
{

  	currentStep++;
  
  	if (currentStep<=numSteps)
  	{
		var hexRed=decToHex(currentRed);
		var hexGreen=decToHex(currentGreen);
		var hexBlue=decToHex(currentBlue);	
		var color="#"+hexRed+""+hexGreen+""+hexBlue+"";
		document.getElementById('fadesection').style.display="block";
		document.getElementById('fadesection').style.background=color;
		currentRed+=deltaRed;
		currentGreen+=deltaGreen;
		currentBlue+=deltaBlue;		
	  	timerID=setTimeout("fade()", 200); 
                  		   		      
   }
}
////////////////////////////////////////
// convert decimal to hexadecimal number
////////////////////////////////////////
function decToHex(decNum)
{

	decNum=Math.floor(decNum);
	var decString=""+decNum;

	for (var i=0; i<decString.length; i++)
	{	
		if (decString.charAt(i)>='0' && decString.charAt(i)<='9')
		{
		}
		else
		{
			alert(decString+" is not a valid decimal number because it contains "+decString.charAt(i));
 			return decNum;
		}
	}
	var result=decNum;
	var remainder="";
	var hexNum="";
	var hexAlphabet=new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F");
	while (result>0)
	{
		result=Math.floor(decNum/16);
		remainder=decNum%16;
		decNum=result;


		hexNum=""+hexAlphabet[remainder]+""+hexNum;
	};

	if (hexNum.length==1)
		hexNum="0"+hexNum;
	else if (hexNum.length==0)
		hexNum="00";
	return hexNum;
}   

function fadeRandom()
{
	startFadeDec(sR, sG, sB, eR, eG, eB, 10);
}