jQuery.cookie = function(name, value, options) {
          if (typeof value != 'undefined') {
                    options = options || {};
                    if (value === null) {
                              value = '';
                              options = $.extend({}, options);
                              options.expires = -1;
                    }
                    var expires = '';
                    if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
                              var date;
                              if (typeof options.expires == 'number') {
                                        date = new Date();
                                        date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
                              } else {
                                        date = options.expires;
                              }
                              expires = '; expires=' + date.toUTCString();
                    }
                    var path = options.path ? '; path=' + (options.path) : '';
                    var domain = options.domain ? '; domain=' + (options.domain) : '';
                    var secure = options.secure ? '; secure' : '';
                    document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
          } else {
                    var cookieValue = null;
                    if (document.cookie && document.cookie != '') {
                              var cookies = document.cookie.split(';');
                              for (var i = 0; i < cookies.length; i++) {
                                        var cookie = jQuery.trim(cookies[i]);
                                        if (cookie.substring(0, name.length + 1) == (name + '=')) {
                                                  cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                                                  break;
                                        }
                              }
                    }
                    return cookieValue;
          }
};


function checkEmail(el)//用正则表达式判断
{
    var regu = "^(([0-9a-zA-Z]+)|([0-9a-zA-Z]+[_.0-9a-zA-Z-]*[0-9a-zA-Z-]+))@([a-zA-Z0-9-]+[.])+([a-zA-Z]|net|NET|asia|ASIA|com|COM|gov|GOV|mil|MIL|org|ORG|edu|EDU|int|INT|cn|CN|cc|CC)$"
    var re = new RegExp(regu);
    if(el.search(re) == -1)
    {
    return true; //非法
    }
    return false;//正确
}


function setTimeClean(url) {
    setTimeout("clear('" + url + "')", 3000);
}

function clear(url) {
    window.location.href = url;
}

function cls(){ 
//捕获触发事件的对象，并设置为以下语句的默认对象 
with(event.srcElement) 
     //如果当前值为默认值，则清空 
if(value==defaultValue) value="" 
} 
function res(){ 
//捕获触发事件的对象，并设置为以下语句的默认对象 
with(event.srcElement) 
//如果当前值为空，则重置为默认值 
if(value=="") value=defaultValue 
}