var imageTimerID;

function swapImage(myID,myGif) {
 myID.setAttribute('src', 'images/'+myGif)
}

function setOpacity(myID,value) {
 value=parseInt(value);
 var mydec = value/100;
 mydec = mydec.toFixed(2); 
 myObj=document.getElementById(myID);
 myObj.style.opacity = mydec;
 myObj.style.filter = 'alpha(opacity=' + value + ')';
}


function animateTimer() {
 intervalID = setInterval("animateLoop()",7);
}

function animateLoop() {
 if(loopcounter < 500) {
  loopcounter = loopcounter + 6;  
 } else {
  setOpacity('rh5',100);
  clearInterval(intervalID)
 }
 if (loopcounter > 400) {
  setOpacity('rh4',100);
  setOpacity('rh5',loopcounter-400);
 } else if (loopcounter > 300) {
  setOpacity('rh3',100);
  setOpacity('rh4',loopcounter-300);
 } else if (loopcounter > 200) {
  setOpacity('rh2',100);
  setOpacity('rh3',loopcounter-200);
 } else if (loopcounter > 100) {
  setOpacity('rh1',100);
  setOpacity('rh2',loopcounter-100);
 } else {
  setOpacity('rh1',loopcounter);
 }
}

function screenRes() {
 var myRows = screen.height;
 var myCols = screen.width;
 var myLink = "gallery.php?width="+myCols+"&height="+myRows;
 document.getElementById('gallery').href=myLink;
}

function readCookie(name) {
 var nameEQ = name + "=";
 var ca = document.cookie.split(';');
 for(var i=0;i < ca.length;i++) {
  var c = ca[i];
  while (c.charAt(0)==' ') c = c.substring(1,c.length);
  if (c.indexOf(nameEQ) == 0) {
   return unescape(c.substring(nameEQ.length,c.length)).replace(/\+/g, ' ');
  }
 }
 return "";
}

function writeCookie(name,value) {
 var date = new Date();
 date.setTime(date.getTime()+(365*24*60*60*1000));
 var expires = "; expires="+date.toGMTString();
 document.cookie = name+"="+value+expires+"; path=/";
}