Jquery arrow triggers

/**
 * @author Thebys
 */
$(document).ready(function() {
    $("#leftarrow").click(function() {
        var radioButtons = $('input[name=slide]:checked').index();
        var indexToSelect = parseFloat(radioButtons) - 2;
        $("#sliderControl :eq(" + indexToSelect + ")").prop("checked", true);

    });
    $("#rightarrow").click(function() {
        var radioButtons = $('input[name=slide]:checked').index();
        var indexToSelect = parseFloat(radioButtons) + 2;
        $("#sliderControl :eq(" + indexToSelect + ")").prop("checked", true);
    });
});