// JavaScript Document
String.prototype.encodeSimple = function() {
  var s = "";
  for(var i = 0; i<this.length; i++) {
    var c = this.charCodeAt(i);
    s += ((c>0 && c<255) ? c : (escape(this.charAt(i))).replace("%","")) + "_";
  }
  return s;
};

String.prototype.decodeSimple = function() {

};

String.prototype.toJson = function() {
  var testSample = this.replace(/^\?/,""),
    group = testSample.split("&"),
    s = {};
  for (var i = 0; i<group.length; i++) {
    var member = group[i],
      n = member.split("=")[0],
      v = member.split("=")[1];
    s[n] = decodeURIComponent(v) + '';
  }
  return s;
};
//字符串截取指定长度
String.prototype.getLimitCharsStr = function(limit) {
  if(this.length <= limit) {
    return this;
  }
  return this.substring(0,limit) + "...";
};

Date.prototype.formatYYYYMMDD = function(separator) {
  var y = this.getFullYear();
  var m = this.getMonth() + 1;
  m = m < 10 ? '0' + m : m;
  var d = this.getDate();
  d = d < 10 ? ('0' + d) : d;
  return y + separator + m + separator + d;
};