function setCookie(_name,_value) {
   var value=_value;
   var name=_name;

   var now = new Date();
   fixDate(now);
   now.setTime(now.getTime() + 12 * 31 * 24 * 60 * 60 * 1000);
   var expires=now;

   var curCookie = name + "=" + escape(value) +  
       "; path=/" +
       ((expires) ? "; expires=" + expires.toGMTString() : "");


   document.cookie = curCookie;

}
    

function getCookie(_name) {
    var name=_name;
    var prefix = name + "=";
    var cookieStartIndex = document.cookie.indexOf(prefix);

    if (cookieStartIndex == -1)
    return null
    var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length)
    if (cookieEndIndex == -1)
    cookieEndIndex = document.cookie.length;
	

    var plainval=unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex));

    return plainval;
}
    
function deleteCookie() {
    if (getCookie()) {
       document.cookie = name + "=" +
       ((path) ? "; path=" + path : "") +
       ((domain) ? "; domain=" + domain : "") +
       "; expires=Thu, 01-Jan-70 00:00:01 GMT"
    }
}
    
function fixDate(date) {
    var base = new Date(0)
    var skew = base.getTime()
    if (skew > 0)
    date.setTime(date.getTime() - skew)
}