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 "";
}


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

function deleteCookie(c_name)
{
    if (getCookie(c_name))
    {

     document.cookie=c_name+ ";expires=Thu, 01-Jan-70 00:00:01 GMT"+ ";" + ";";

    }
}



/*
function checkCookie(cookiename)
{
    value=getCookie(cookiename);
    
    if (value!=null && value!="")
    {
        alert('Welcome again '+value+'!');
    }
    else 
    {
        value=prompt('Please enter your name:',"");
        if (value!=null && value!="")
        {
            setCookie(cookiename,value,365);
        }
    }
    
}
*/