var source = 0;
var replacement = 1;

function createRollOver(originalImage,replacementImage) {
	var imageArray = new Array;
	imageArray[source] = new Image;
	imageArray[source].src = originalImage;
	imageArray[replacement] = new Image;
	imageArray[replacement].src = replacementImage;
	return imageArray;
}

function roll(targetImage,displayImage) {
	targetImage.src = displayImage.src;
}

function sectionOn(on) {
          document.getElementById(on).style.background = "url(images/sectionActive.png) no-repeat center";
}            
function sectionOff(off) {
     if (document.getElementById('s' + off).style.display == 'none') {
          document.getElementById(off).style.background = "url(images/sectionInactive.png) no-repeat center";
     }
}
function changeVisibility(date) {
    if (document.getElementById(date).style.display == 'block'){
          document.getElementById(date).style.display = 'none';
          } else {    
          document.getElementById(date).style.display = 'block';
     }
}