$( function() {
    $( ".imagecontainer" ).each( function() {
        $( this ).mouseover( function() {
            $( this ).addClass( "hover" );
        } );
        $( this ).mouseout( function() {
            $( this ).removeClass( "hover" );
        } );
    } )
} );

function vote( a, mode, set, img ) {
    $.ajax( {
        url: "/vote.php",
        data: { mode: mode, imageset: set, image: img },
        dataType: "plain",
        type: "post",
        success:function() {
            var p = a.parentNode;
            while ( p.nodeName != "DIV" ) 
                p = p.parentNode;
            $( 'a', p ).before( '<b>&nbsp;</b>' ).remove();
        }
    } );
}