JSF表格中selectBooleanCheckbox快选功能JS代码

function selectAll(){
            var _input = document.forms['holidayForm'].getElementsByTagName('input');
            if(event.srcElement.checked){
                for(var i = 0; i < _input.length;i ++){
                    if(_input[i].type == 'checkbox'){
                            _input[i].checked = true;
                    }
                }
            } else {
                for(var i = 0; i < _input.length;i ++){
                    if(_input[i].type == 'checkbox'){
                            _input[i].checked = false;
                    }
                }
            }
        }
        function validateAllSelect(){
            var _input = document.forms['holidayForm'].getElementsByTagName('input');
            var _first = document.getElementById('thefirst');
            if(event.srcElement.checked){
                var _flag = true;
                for(var i = 0; i < _input.length;i ++){
                    if(_input[i].type == 'checkbox'&&_input[i].id!='thefirst'&& !_input[i].checked){
                            _flag = false
                    }
                }
                if(_flag){
                    _first.checked = true;
                }
            } else {
                _first.checked = false;
            }
        }