// JavaScript Document
function setCookie(c_name,value,expiredays)
{
	var exdate=new Date()
	exdate.setDate(expiredays)
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" : ";expires="+exdate)
}

function getCookie(c_name)
{
	if (document.cookie.length>0)
	{ 
		c_start=document.cookie.indexOf(c_name + "=")
	if (c_start!=-1)
	{ 
		c_start=c_start + c_name.length+1 
		c_end=document.cookie.indexOf(";",c_start)
		if (c_end==-1) c_end=document.cookie.length
			return unescape(document.cookie.substring(c_start,c_end))
		} 
	}
	return null
}
function checkCookie()
{
	username=getCookie('username')
	if (username!=null)
	  {alert('Welcome again '+username+'!')}
	else 
	  {username=prompt('Please enter your name:',"")
	  setCookie('username',username,365)}
}
function DeleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) {
		document.cookie = name + "=" +
		( ( path ) ? ";path=" + path : "") +
		( ( domain ) ? ";domain=" + domain : "" ) +
		";expires=Thu, 01-Jan-1970 00:00:01 GMT";
	}
}