//Cookie ²Ù×÷
function writeCookie(name, value, days)
{
    if (days)
    {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        var expires = "; expires=" + date.toGMTString();
    }
    else var expires = "";
    document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name)
{
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i++)
    {
        var c = ca[i];
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}

function clearCookie(name)
{
    writeCookie(name, "", -1);
}

function queryString(url,k)
{
    url=url.split('?')[1];
    
    if(url)
    {
        if(url.indexOf('#')>0)
            url=url.substring(0,url.indexOf('#'));
            
        var k_v=url.split('&');
        
        for(i=0;i<k_v.length;i++)
        {
            var temp=k_v[i].split('=');
            
            if(temp[0]==k)
            {
                return temp[1];
                break;
            }
        }
    }
    
    return '';
}

function isEmail(s)
{
    if (s.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
        return true;
    else
        return false;
}