DOM:{
            /**
             * 支持类型
             * #id
             * .class
             * tag
             */
            _findChild:function(parent,text){
                var that=myCore.DOM,
                    indexid=text.indexOf('#'),
                    id=text.slice(indexid+1),
                    indexcls=text.indexOf('.'),
                    cls=text.slice(indexcls+1),
                    tag=text.slice(0,indexcls);
                //处理单个选择符的多种情况
                if(indexid!=-1){
                    //如果有#直接返回
                    return [doc.getElementById(id)];
                }else if(indexcls!=-1 && indexcls!=0){
                    //有cls并且含有tag
                    return that._getElementsByClassName(cls,parent,tag);
                }else if(indexcls!=-1 && indexcls==0){
                    //含有cls，并且仅有cls
                    return that._getElementsByClassName(text.slice(1),parent);
                }else{
                    //只含有tag
                    return Array.prototype.slice.call(parent.getElementsByTagName(text),0);
                }
            },
            _getElementsByClassName:function(cls,parent,tag){
                var results=[];
                if(parent==null) parent=doc;
                if(!tag) tag='*';

                function likecls(s,o){
                    var ary=o.split(' ');
                    for(var i=0;i<ary.length;i++){
                        if(s==ary[i]) return true;
                    }
                    return false;
                }
                var eles=parent.getElementsByTagName(tag);
                for(var i=0;i<eles.length;i++){
                    if(eles[i].className==cls || likecls(cls,eles[i].className)){
                        results.push(eles[i]);
                    }
                }
                return results;
            },
            _selector:function(selectors){
                var fn=myCore.fn,
                    that=myCore.DOM,
                    selectors=selectors,
                    realselector='',
                    order=[], //选择器序列
                    result,
                    results;

                if(typeof(selectors)!='string') return null;

                //首先按照空格分组
                order=selectors.split(' ');

                //先找第一个id，确定序列的最高级
                //如果没有id则找tag，
                //如果没有tag则找class
                for(var i=order.length-1;i>=0;i--){
                    var selector=order[i].slice(0,1);
                    if(selector=='#'){
                        realselector+=' '+order[i];
                        break;
                    }else{
                        if(order[i].match(/#/)){
                            realselector+=' '+order[i];
                            break;
                        }else{
                            realselector+=' '+order[i];
                        }
                    }
                }
                //确定最后的序列,排除多ID情况
                order=realselector.slice(1).split(' ').reverse();

                if(order.length==1){
                    //没空格，单选择的直接返回值
                    return that._findChild(doc,order[0]);
                }else{
                    //多个空格的迭代寻找
                    for(var i=0;i<order.length;i++){
                        if(i==order.length-1) return results;

                        result=that._findChild(doc,order[i]);

                        results=[];

                        for(var j=0;j<result.length;j++){
                            results=results.concat(that._findChild(result[j],order[i+1]));
                        }
                    }
                    return results;
                }
            },
            query:function(selector){
                var that=myCore.DOM;
                if(doc.querySelectorAll) return doc.querySelectorAll(selector);
                return that._selector(selector);
            },
            get:function(selector){
                var that=myCore.DOM;
                if(doc.querySelector) return doc.querySelector(selector);
                var result=that._selector(selector);
                if((typeof(result)=="object") && (result instanceof Array)) return result[0];
                return result;
            }
        },