// preload list of carrier images
var carrierImages = new Array();
carrierImages[0] = "../images/carriers/anthem_xxsmall.jpg";
carrierImages[1] = "../images/carriers/kaiser_xxsmall.jpg";
carrierImages[2] = "../images/carriers/aetna_xxsmall.jpg";
carrierImages[3] = "../images/carriers/blueshield_xxsmall.jpg";
carrierImages[4] = "../images/carriers/healthnet_xsmall.jpg";
carrierImages[5] = "../images/carriers/vsp_xxsmall.jpg";
preloadImages(carrierImages);

// this number loops from 0-carrierImages.length
var carrierImageNumber = 0;

function preloadImages(arr)
{
	if (document.images)
	{
		var myimages = new Array(arr.length);
		for (x=0; x<arr.length; x++)
		{
			myimages[x] = new Image();
			myimages[x].src = arr[x];
		}
	}
}

function changeCarrierImg()
{
	var carrierImage = document.getElementById('carrierImg');
	carrierImage.src = carrierImages[carrierImageNumber];
	carrierImageNumber++;
	if(carrierImageNumber >= carrierImages.length)
		carrierImageNumber = 0;
}