function(){
        var me = this,
            prev = me.store.currentPage - 1;

        if (prev > 0) {
            if (me.fireEvent('beforechange', me, prev) !== false) {
                me.store.previousPage();
            }
        }
    }
function(){
        var me = this,
            prev = me.store.currentPage - 1;

        if (prev > 0) {
            if (me.fireEvent('beforechange', me, prev) !== false) {
                me.store.previousPage();
            }
        }
    }
function ( ) { var me = this , prev = me . store . currentPage - 1 ; if ( prev > 0 ) { if ( me . fireEvent ( 'beforechange' , me , prev ) !== false ) { me . store . previousPage ( ) ; } } }
Move to the previous page, has the same effect as clicking the 'previous' button.
Move to the previous page has the same effect as clicking the previous button .