String.prototype.trim = function() 
{ 
    return this.replace(/(^\s*)|(\s*$)/g, ""); 
} 

function getCookie(name) 
{ 
    var cookies = document.cookie.split(";"); 
    for (var i = 0; i < cookies.length; i++) { 
        var s = cookies[i].trim().split('='); 
        if (name == s[0]) return unescape(s[1]); 
    } 
    return null; 
}