在适当的位置（如模板footer页内）插入下面这段JS代码：
<script type="text/javascript">
window.onkeydown = function(e){

    var tarNN = e.target.nodeName;
    if (tarNN !== 'BODY' && tarNN !== 'HTML') return;

    //var inputs = ['INPUT', 'TEXTAREA', 'SELECT'];
    //if( inputs.indexOf( document.activeElement.tagName ) > -1 ) return;

    var url;
    switch(e.keyCode) {
        case 37: // <-
            url = $("li.prev a, div.archives_page_bar a.prev").first().attr("href");
            break;
        case 39: // ->
            url = $("li.next a, div.archives_page_bar a.next").first().attr("href");
            break;
        default:
            return;
    }
    if(url) document.location = url;
};
</script>
12