function ImageChange(obj,filename){
	obj.src=filename;
}

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 start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if((!start) && (name != document.cookie.substring(0,name.length))) return null;

	if(start == -1) return null;
	var end = document.cookie.indexOf(";",len);
	if(end == -1) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ));
}

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