function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		//alert(c);
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}
function createCookie(name,value,days)
{
	if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}
function getImageColor(){
	var cookieVal = readCookie("ImageColor");
	if(cookieVal==null){
		images = new Array(5);
		images[0] = "blue";
		images[1] = "green";
		images[2] = "yellow";
		images[3] = "red";
		images[4] = "white";
		index = Math.floor(Math.random() * images.length);
		createCookie("ImageColor",images[index],0);
		
		cookieVal = readCookie("ImageColor");
	}
	return cookieVal;
}