input --- enter键后，光标不移走的实现，仍旧停留在输入框内

重点： return false

$('#bguploadInp').keydown(function(event){

    var keycode = event.which || event.keyCode;
    if (oldInpuValue && oldInpuValue === event.currentTarget.value)return;

    if (keycode == 13) {
        oldInpuValue = event.currentTarget.value;
        //添加背景搜索 mj
        if($scope.isbgimgsetpage){
            $scope.myFilter=event.currentTarget.value;
        }else{
            findTemplateTheme($scope.selType,$scope.selID,event.currentTarget.value);
        }

        return false;
    }
})