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      JavaScript 封装Utils库

      var Tool = function () {//构造函数模式;用的时候需要new一下;
          this.flag = "getElementsByClassName" in document;
          //getElementsByClassName 在IE678中是不存在的。用这个来判断是不是低版本的IE浏览器;
          //每次只需要判断this.flag是否存在就可以了;如果存在就是标准浏览器,如果不存在就是IE;
      };
      Tool.prototype = {//方法是定义在Tool的prototype上的;
          constructor: Tool,//重写prototype后,prototype的constructor已经不是原来的Tool了;需要手动给他强制写会到Tool上去;
          /*经常用到的函数*/
          getElementsByClassName: function (context,cName) {//获取元素的ClassName
              var context = context || document;
              var ary = [];
              if (this.flag) {
                  return this.listToArray(context.getElementsByClassName(cName));
              }
              var allNode = context.getElementsByTagName("*");
              var reg = new RegExp("(?:^| +)" + cName + "(?: +|$)");
              for (var i = 0; i < allNode.length; i++) {
                  var cur = allNode[i];
                  if (reg.test(cur.className)) {
                      ary.push(cur);
                  }
              }
              return ary;
          },
          toJSON: function (jsonStr) {//将json字符串转化为json对象
              var jsonObj = null;
              try {
                  jsonObj = JSON.parse(jsonStr);//如果支持 JSON.parse则直接使用 JSON.parse将JSON字符串转换为JSON对象。
              } catch (e) {
                  jsonObj = eval("(" + jsonStr + ")");
              }
              return jsonObj;
          },
          isType: function (value,type) {//判断数据类型;
              var type = arguments[1] || "Object",
                  reg = new RegExp("\\[object " + type + "\\]", "i");
              return reg.test({}.toString.call(value));//{}不可以是[],因为[]就不是Object.prototype,数组也有toString方法;
          },
          listToArray: function (likeAry) {//类数组转化为数组;
              var ary = [];
              if (this.flag) {
                  ary = [].slice.call(likeAry, 0);
              } else {
                  for (var i = 0; i < likeAry.length; i++) {
                      ary.push(likeAry[i]);
                  }
              }
              return ary;
          },
      
          /***下面是设置DOM***/
          getEleChildren: function (parent,tagName) {//获取指定节点名的元素节点们;第二个参数如果不传,则返回obj下的所有子元素节点;
              var allNode = parent.childNodes,
                  ary = [],
                  reg = new RegExp("^" + tagName + "$", "i");
              for (var i = 0; i < allNode.length; i++) {
                  var cur = allNode[i];
                  if (cur.nodeType === 1) {
                      if (tagName) {//tahName不可能为0,false之类的数;所以可以用if直接判断传进来的参数;
                          if (reg.test(cur.nodeName)) {
                              ary.push(cur);
                          }
                          continue;
                      }
                      ary.push(cur);
                  }
              }
              return ary;
          },
          getFirst: function (curEle) {//获取第一个元素节点;
              var children = this.getEleChildren(curEle);
              return children.length > 0 ? children[0] : null;
          },
          getLast: function (curEle) {//获取最后一个元素节点;
              var children = this.getEleChildren(curEle);
              return children.length > 0 ? children[children.length - 1] : null;
          },
          getPre: function (curEle) {//上一个哥哥节点;
              if (this.flag) {
                  return curEle.previousElementSibling;
              }
              var pre = curEle.previousSibling;
              while (pre && pre.nodeType !== 1) {
                  pre = pre.previousSibling;
              }
              return pre;
          },
          getPres: function (curEle) {//获得所有哥哥们;
              /*            var ary = [],
               attr = this.flag ? "previousElementSibling" : "previousSibling";
               var pre = curEle[attr];
               while (pre) {
               if (pre.nodeType === 1) {
               ary.unshift(pre);
               }
               pre = pre[attr];
               }
               return ary;*/
              var ary = [],
                  next = this.getPre(curEle);
              while (next) {
                  ary.unshift(next);
                  next = this.getPre(next);
              }
              return ary;
          },
          getNext: function (curEle) {//下一个弟弟节点,第一个弟弟节点;
              if (this.flag) {
                  return curEle.nextElementSibling;
              }
              var next = curEle.nextSibling;
              while (next && next.nodeType !== 1) {
                  next = next.nextSibling;
              }
              return next;
          },
          getNexts: function (curEle) {//获取所有的弟弟们;
              var ary = [],
                  next = this.getNext(curEle);
              while (next) {
                  ary.push(next);
                  next = this.getNext(next);
              }
              return ary;
          },
          getSibling: function (curEle) {//获取上一个哥哥和下一个弟弟;
              var ary = [],
                  pre = this.getPre(curEle),
                  next = this.getNext(curEle);
              pre ? ary.push(pre) : void 0;
              next ? ary.push(next) : void 0;
              return ary;
          },
          getSiblings: function (curEle) {//获取所有的兄弟们(除了自己)
              var pres = this.getPres(curEle),
                  nexts = this.getNexts(curEle);
              return pres.concat(nexts);
          },
          getIndex: function (curEle) {//获取元素的索引值;
              return this.getPres(curEle).length;
          },
          insertAfter: function (newEle,oldEle) {//在目标元素oldEle后面插入新元素newEle;如果没有传指定元素,则直接添加在后面
              var next = this.getNext(oldEle),
                  par = oldEle.parentNode;
              next ? par.insertBefore(newEle, next) : par.appendChild(newEle);
          },
          prependChild: function (parentEle,curEle) {//把一个元素节点添加为parentEle的第一个子节点;
              var first = this.getFirst(parentEle);//获取par中的第一个元素节点;
              first ? parentEle.insertBefore(curEle, first) : parentEle.appendChild(curEle);
          },
          innerHTML: function (curEle,str) {//获取元素的innerHTML;
              var str= str || "";
              if (!str) {
                  return curEle.innerHTML;
              }
              curEle.innerHTML = str;
          },
          text:function (ele,str){//处理innerText和textContent的兼容性;传一个参数是获取;2个参数是设置;
              if(ele&&ele.nodeType&&ele.nodeType==1){
                  if(str===undefined){//如果str没有传,那么方法是获取元素的文本内容;
                      if(typeof ele.textContent=='string')
                          return ele.textContent;
                      else
                          return ele.innerText;
      
                  }else{//如果传了,就是添加文本内容
                      if(str===null){
                          alert('text方法参数错误,str为null!');
                          return ;
                      }else if(typeof str=='string'){
                          if(typeof ele.textContent=='string') {
                              ele.textContent += str;
                          }else{
                              ele.innerText+=str;
                          }
                      }else{
                          alert('text方法的参数错误!')
                      }
                  }
              }else{
                  alert('text方法的ele参数错误!')
              }
          },
      
          /***下面是设置CSS***/
          setCss:function (curEle,attr,value) {//设置CSS属性值和获取CSS;如果三个参数就是设置,2个参数就是获取;att是attribute的缩写;
              if(typeof value==="undefined"){//如果有第三个参数,就是设置Css;如果没有就是获取Css;
                  var reg = /^(?:margin|padding|border|float|position|display|background|backgroundColor)$/;
                  var value = this.flag ? window.getComputedStyle(curEle, null)[attr] : curEle.currentStyle[attr];
                  return !reg.test(attr) ? parseFloat(value) : value;
              } else{
                  switch (attr) {
                      case "opacity":
                          curEle["style"][attr] = value;
                          curEle["style"]["filter"] = "alpha(opacity=" + (value * 100) + ")";
                          break;
                      case "zIndex":
                          curEle["style"][attr] = value;
                          break;
                      default:
                          curEle["style"][attr] = !isNaN(value) ? value += "px" : value;
                  }
              }
          },
          setGroupCss: function (curEle,cssObj) {//给元素设置一组属性;cssObj是一个对象类型;
              for (var key in cssObj) {
                  this.setCss(curEle, key, cssObj[key]);
              }
          },
          offset: function (curEle) {//获取偏移量;
              var  par = curEle.offsetParent,
                  left = curEle.offsetLeft,
                  top = curEle.offsetTop;
              while (par) {
                  left += par.offsetLeft;
                  top += par.offsetTop;
                  if (navigator.userAgent.indexOf("MSIE 8.0") <= -1) {
                      left += par.clientLeft;
                      top += par.clientTop;
                  }
                  par = par.offsetParent;
              }
              return {left: left, top: top};
          },
          hasClassName: function (curEle,cName) {//判断是否有某个className;
              var reg = new RegExp("(?:^| +)" + cName + "(?: +|$)");
              return reg.test(curEle.className);
          },
          addClassName: function (curEle,cName) {//增加某个className;
              if (!this.hasClassName(curEle,cName)) {
                  curEle.className += (" " + cName);
              }
          },
          removeClassName: function (curEle,cName) {//移除类样式的方法;
              var reg = new RegExp("(?:^| +)" + cName + "(?: +|$)", "g");
              if (this.hasClassName(curEle,cName)) {
                  curEle.className = curEle.className.replace(reg, " ");
              }
          }
      };
      ~function () {//在DOM库上增加方法,同时不影响原来的方法;在类的原型上增加方法;
          var strPro = String.prototype,
              aryPro = Array.prototype,
              objPro = Object.prototype;
          aryPro.removeRepeat = function () {//数组去重;
              var obj = {};
              for (var i = 0; i < this.length; i++) {
                  var cur = this[i];
                  if (obj[cur] == cur) {
                      this.splice(i, 1);
                      i--;
                      continue;
                  }
                  obj[cur] = cur;
              }
              obj = null;
              return this;
          };
          aryPro.forEachPro = function (fn,context) {//forEach兼容性处理;
              var context = context || window;
              if (this.forEach) {
                  this.forEach(fn, context);
                  return this;
              }
              for (var i = 0; i < this.length; i++) {
                  fn.call(context, this[i], i, this);
              }
              return this;
          };
          objPro.myHasPubProperty = function (attr) {//是否为公有属性;
              return (attr in this) && !this.hasOwnProperty(attr);
          };
          strPro.myTrim = function () {//去除首尾空格;
              return this.replace(/(^\s*|\s*$)/g, "");
          };
          strPro.mySub = function (len,isD) {//是不是有效的
              var len = len || 10,
                  isD = isD || false,
                  str = "",
                  n = 0;
              for (var i = 0; i < this.length; i++) {
                  var s = this.charAt(i);
                  /[\u4e00-\u9fa5]/.test(s) ? n += 2 : n++;
                  if (n > len) {
                      isD ? str += "..." : void 0;
                      break;
                  }
                  str += s;
              }
              return str;
          };
          strPro.myFormatTime = function (format) {//时间格式化;
              var reg = /^(\d{4})(?:-|\/|\.|:)(\d{1,2})(?:-|\/|\.|:)(\d{1,2})(?:\s+)(\d{1,2})(?:-|\/|\.|:)(\d{1,2})(?:-|\/|\.|:)(\d{1,2})$/g,
                  ary = [];
              this.replace(reg, function () {
                  ary = ([].slice.call(arguments)).slice(1, 7);
              });
              var format = format || "{0}年{1}月{2}日 {3}:{4}:{5}";
              return format.replace(/{(\d+)}/g, function () {
                  var val = ary[arguments[1]];
                  return val.length === 1 ? "0" + val : val;
              });
          };
          strPro.myQueryURLParameter = function () {//是否是有效URL
              var reg = /([^?&=]+)=([^?&=]+)/g, obj = {};
              this.replace(reg, function () {
                  obj[arguments[1]] = arguments[2];
              });
              return obj;
          }
      }();
      
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