// rotate_home_pics.js

var bState = -1;
var timeDelayPic = 5000;
var myImg = new Array( "images/home/picture_frames_0365.jpg", 
					   "images/home/picture_frames_0366.jpg",
					   "images/home/pic_molding.jpg",
					   "images/home/picture_frames_0367.jpg" );
var alt = new Array( "Colorado Frame Manufacturing, Inc.", 
					 "Colorado Frame Manufacturing, Inc.", 
					 "Extensive frame molding stock",
					 "Colorado Frame Manufacturing, Inc." );

function rotatePics()
 {
 var tStart = new Date();

  // increment picture counter
  if( bState >= myImg.length -1 )
   { bState = 0; }
  else
   { bState = bState + 1; }

 if( document.home_rot_pic )
  {
  document.home_rot_pic.src = myImg[ bState ];
  document.home_rot_pic.alt = alt[ bState ];
  
  // wait until time to proceed
  var tEnd   = new Date();
  var tDelay = timeDelayPic - tEnd.getTime() + tStart.getTime();
  if( tDelay < 0 ) 
   { tDelay = 0; }

  // display the next banner
  setTimeout( "rotatePics()", tDelay );
  }
 }