function jtrim(s) {
  var i, b = 0, e = s.length;
  for (i = 0; i < s.length; i++) if (s.charAt(i) != ' ') {b = i;break;}
  if (i == s.length) return "";
  for (i = s.length - 1; i > b; i--) if (s.charAt(i)!=' ') {e = i;break;}
  return s.substring(b, e + 1);
}

function isNumeral(s){
  if (s != "") {
    for (var i = 0; i < s.length; i++) {
      if (s.charAt(i) > "9" || s.charAt(i) < "0") {
        //alert("请输入正确的数字。");
        return false;
      }
    }
  }
  return true;
}

function loadXML(url) {
  var result = "";
  var xmlhttp = false;
  if(window.XMLHttpRequest) {
    xmlhttp = new XMLHttpRequest();
    if (xmlhttp.overrideMimeType) {xmlhttp.overrideMimeType('text/xml');}
  }
  else if (window.ActiveXObject) {
    try {xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");} catch (e) {
      try {xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");} catch (e) {}
    }
  }
  if (!xmlhttp) window.alert("不能创建XMLHttpRequest对象实例.");
  xmlhttp.onreadystatechange = function processRequest () {
    if (xmlhttp.readyState == 4) {
      if (xmlhttp.status == 200) {
        //xmlhttp.responseText;
        var response = xmlhttp.responseXML;
        var node = response.getElementsByTagName("data");
        result = node[0].getElementsByTagName("returnValue")[0].firstChild.nodeValue;
      }
      else {
        alert("您所请求的页面有异常。");
      }
    }
  };
  xmlhttp.open("GET", url, false);
  xmlhttp.send(null);
  return result;
}

function getTime(type){
  var time = "";
  var arrmonth=new Array("01","02","03","04","05","06","07","08","09","10","11","12");
  var mydate = new Date();
  var year = mydate.getYear();
  if (year < 1000) year += 1900;
  var day = mydate.getDay();
  var month = arrmonth[mydate.getMonth()];
  var daym = mydate.getDate();
  if (daym < 10) daym = "0" + daym;
  var hours = mydate.getHours();
  if (hours < 10) hours = "0" + hours;
  var minutes = mydate.getMinutes();
  if (minutes < 10) minutes = "0" + minutes;
  var seconds = mydate.getSeconds();
  if (seconds < 10) seconds = "0" + seconds;
  if (type == 0) time = year + "" + month + "" + daym + "" + hours + "" + minutes + "" + seconds;
  if (type == 1) time = year + "-" + month + "-" + daym + " " + hours + ":" + minutes + ":" + seconds;
  if (type == 2) time = year + "年" + month + "月" + daym + "日 " + hours + ":" + minutes + ":" + seconds;
  if (type == 3) time = year + "年" + month + "月" + daym + "日 " + hours + "时" + minutes + "分" + seconds + "秒";
  return time;
}

//写cookies
function setCookie(name, value, day)  {
  var exp = new Date();
  exp.setTime(exp.getTime() + day*24*60*60*1000);
  document.cookie = name + "=" + escape (value) + ";expires=" + exp.toGMTString();
}
//读取cookies
function getCookie(name) {
  var arr,reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
  if (arr = document.cookie.match(reg)) return unescape(arr[2]);
  else return null;
}
//删除cookies
function delCookie(name) {
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cval = getCookie(name);
  if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
}