// JavaScript Document
//Get cookie routine
function get_cookie(cookie_name) {
	var search = cookie_name + "="
	var returnvalue = "";
	if (document.cookie.length > 0) {
    	offset = document.cookie.indexOf(search)
    // if cookie exists
	if (offset != -1) { 
		offset += search.length
		// set index of beginning of value
		end = document.cookie.indexOf(";", offset);
		// set index of end of cookie value
		if (end == -1) end = document.cookie.length;
			returnvalue=unescape(document.cookie.substring(offset, end))
		}
	}
	return returnvalue;
}

function set_cookie(cookie_name,cookie_value,num_days,path,domain) {
	var today = new Date();
	var expire = new Date();
	if (num_days==null || num_days==0) num_days=1;
	expire.setTime(today.getTime() + 3600000*24*num_days);
	document.cookie = cookie_name + "=" + escape(cookie_value) + ";expires=" + expire.toGMTString() + ( ( path ) ? ";path=" + path : "" ) + ( ( domain ) ? ";domain=" + domain : "" );
}

function delete_cookie(name){
	
	if( get_cookie(name) ){
		document.cookie = name + "=;expires=Thu, 01-Jan-1970 00:00:01 GMT";
	}
}