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 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 c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

var backColor = new Array();

backColor[0] = '#FFFFFF';
backColor[1] = '#000000';
backColor[2] = '#000080';
backColor[3] = '#800000';
backColor[4] = '#C0C0C0';
backColor[5] = '#FFFFFF';


function changeBG(whichbackColor){
 document.body.style.backgroundColor = backColor[whichbackColor];
 createCookie('backColor', whichbackColor);
 




}

if(readCookie('backColor'))
 document.write('<style type="text/css">body {background-color: ' + backColor[readCookie("backColor")] + ';}<\/style>');