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);
}
function firstvisit(name){
    var cookie_val=readCookie('rvs');
    if(cookie_val){
	if(cookie_val==1){
	document.getElementById('rvs').style.visibility="visible";
	}else{
	//do not display the div
	document.getElementById('rvs').style.visibility="hidden";

}

    }else{
	createCookie('rvs',1,180);
	document.getElementById('rvs').style.visibility="visible";
}
}
function enough(){
    //alert('entering enough');
    var cookie_val=readCookie('rvs');
    //alert(cookie_val);
    if(cookie_val){
	createCookie('rvs',"",-1);
	createCookie('rvs',2,180);

}
    //alert(document.getElementById('rvs').style.visibility);
    document.getElementById('rvs').style.visibility="hidden";

}