$(function() {
    var show_legend_html = "Show icon legend »";
    var hide_legend_html = "Hide icon legend «";
    var $icon_legend = $("#icon_legend");
    var $icon_legend_header = $("p#icon_legend_header");
    $icon_legend.css("display", "none");
    $icon_legend_header.html("<a href='javascript://' id='icon_legend_a'>"+show_legend_html+"</a>");
    var $icon_legend_a = $("a#icon_legend_a");
    $icon_legend_a.toggle(
        function()
        {
            $icon_legend.slideDown();
            $icon_legend_a.html(hide_legend_html);
        },
        function()
        {
            $icon_legend.slideUp();
            $icon_legend_a.html(show_legend_html);
        });
});