工作中常用的js、jquery自定义扩展函数代码片段汇总

//根据URL获取Id
function GetQueryString(name) {
  var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
  var r = window.location.search.substr(1).match(reg);
  if (r != null) return unescape(r[2]); return "";
}

/* 在textarea处插入文本--Start */
(function ($) {
  $.fn.extend({
    "insertContent": function (myValue, t) {
      var $t = $(this)[0];
      if (document.selection) { // ie 
        this.focus();
        var sel = document.selection.createRange();
        sel.text = myValue;
        this.focus();
        sel.moveStart('character', -l);
        var wee = sel.text.length;
        if (arguments.length == 2) {
          var l = $t.value.length;
          sel.moveEnd("character", wee + t);
          t <= 0 ? sel.moveStart("character", wee - 2 * t - myValue.length) : sel.moveStart("character", wee - t - myValue.length);
          sel.select();
        }
      } else if ($t.selectionStart
       || $t.selectionStart == '0') {
        var startPos = $t.selectionStart;
        var endPos = $t.selectionEnd;
        var scrollTop = $t.scrollTop;
        $t.value = $t.value.substring(0, startPos)
         + myValue
         + $t.value.substring(endPos, $t.value.length);
        this.focus();
        $t.selectionStart = startPos + myValue.length;
        $t.selectionEnd = startPos + myValue.length;
        $t.scrollTop = scrollTop;
        if (arguments.length == 2) {
          $t.setSelectionRange(startPos - t,
           $t.selectionEnd + t);
          this.focus();
        }
      } else {
        this.value += myValue;
        this.focus();
      }
    }
  })
})(jQuery);
/* 在textarea处插入文本--Ending */

$("#sltLabel").combobox({
        onSelect: function (item) {
          var item = $('#sltLabel').combobox('getValue');
          if (item != undefined && item != null && item != "") {
            if ($("#sltChannel").val() == 0) {
              UE.getEditor('editor').focus();
              UE.getEditor('editor').execCommand('inserthtml', '{' + item + '}');
            } else {
              $("#txtContent").insertContent('{' + item + '}');
            }
          }
        }
      });

 <select class="easyui-combobox" id="sltLabel" name="sltLabel" style="width: 150px" onselect="change()" data-options="panelWidth: 150,panelHeight: 'auto',valueField: 'Value',textField: 'Text'">
 <option value="">选择要插入的标签</option></select>

// 对Date的扩展，将 Date 转化为指定格式的String
// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符， 
// 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) 
// 例子： 
// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423 
// (new Date()).Format("yyyy-M-d h:m:s.S")   ==> 2006-7-2 8:9:4.18 
Date.prototype.Format = function (fmt) { //author: zouqj 
  var o = {
    "M+": this.getMonth() + 1, //月份 
    "d+": this.getDate(), //日 
    "h+": this.getHours(), //小时 
    "m+": this.getMinutes(), //分 
    "s+": this.getSeconds(), //秒 
    "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
    "S": this.getMilliseconds() //毫秒 
  };
  if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
  for (var k in o)
    if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
  return fmt;
}

//获取当前时间，格式：yyyy-MM-dd hh:mm:ss
function getNowFormatDate() {
  var date = new Date();
  var seperator1 = "-";
  var seperator2 = ":";
  var month = date.getMonth() + 1;
  var strDate = date.getDate();
  if (month >= 1 && month <= 9) {
    month = "0" + month;
  }
  if (strDate >= 0 && strDate <= 9) {
    strDate = "0" + strDate;
  }
  var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
      + " " + date.getHours() + seperator2 + date.getMinutes()
      + seperator2 + date.getSeconds();
  return currentdate;
}

//方式一
function newPseudoGuid () {
      var guid = "";
      for (var i = 1; i <= 32; i++) {
        var n = Math.floor(Math.random() * 16.0).toString(16);
        guid += n;
        if ((i == 8) || (i == 12) || (i == 16) || (i == 20))
          guid += "-";
      }
      return guid;
    }
//方式二
function S4() {
  return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
}
//生成guid
function guid() {
  return (S4() + S4() + "-" + S4() + "-" + S4() + "-" + S4() + "-" + S4() + S4() + S4());