/* $id : utils.js 5052 2007-02-03 10:30:13z weberliu $ */

var browser = new object();

browser.ismozilla = (typeof document.implementation != 'undefined') && (typeof document.implementation.createdocument != 'undefined') && (typeof htmldocument != 'undefined');
browser.isie = window.activexobject ? true : false;
browser.isfirefox = (navigator.useragent.tolowercase().indexof("firefox") != - 1);
browser.issafari = (navigator.useragent.tolowercase().indexof("safari") != - 1);
browser.isopera = (navigator.useragent.tolowercase().indexof("opera") != - 1);

var utils = new object();

utils.htmlencode = function(text)
{
  return text.replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
}

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

utils.isempty = function( val )
{
  switch (typeof(val))
  {
    case 'string':
      return utils.trim(val).length == 0 ? true : false;
      break;
    case 'number':
      return val == 0;
      break;
    case 'object':
      return val == null;
      break;
    case 'array':
      return val.length == 0;
      break;
    default:
      return true;
  }
}

utils.isnumber = function(val)
{
  var reg = /^[\d|\.|,]+$/;
  return reg.test(val);
}

utils.isint = function(val)
{
  if (val == "")
  {
    return false;
  }
  var reg = /\d+/;
  return !reg.test(val);
}

utils.isnum = function(val) {
    if (val == "") {
        return false;
    }
    var reg = /^[0-9]/;
    return !reg.test(val);
}

utils.isemail = function( email )
{
  var reg1 = /([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-za-z]{2,4}|[0-9]{1,3})(\]?)/;

  return reg1.test( email );
}

utils.isusername = function ( val )
{
    var re=/^[0-9a-z][\w-.]*[0-9a-z]$/i;
    if(re.test(val)){return true;}else{return false;}
}

utils.istel = function ( tel )
{
  var reg = /^[\d|\-|\s|\_]+$/; //只允许使用数字-空格等

  return reg.test( tel );
}

utils.ismobile = function ( mobile )
{
    if (/^13\d{9}$/g.test(mobile) || (/^15[0,1,2,3,4,5,6,7,8,9]\d{8}$/g.test(mobile)) || (/^18[0,1,2,3,4,5,6,7,8,9]\d{8}$/g.test(mobile)))
    return true;
  else
    return false;
}

utils.isidcard = function(idcard) {
    var re = /^(\d{14}|\d{17})(\d|[xx])$/;

    if (re.test(idcard)) {
        return true;
    }
    else {
        return false;
    }
}

utils.fixevent = function(e)
{
  var evt = (typeof e == "undefined") ? window.event : e;
  return evt;
}

utils.srcelement = function(e)
{
  if (typeof e == "undefined") e = window.event;
  var src = document.all ? e.srcelement : e.target;

  return src;
}

utils.istime = function(val)
{
  var reg = /^\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}$/;

  return reg.test(val);
}