$(function() {
    //#Attach behaviours to navigation tabs.
    $(".tabs.navigation:first").each(function() {
        //Attach behaviour to enabled tabs.     
        $(this).find('a:not(.disabled)').click(function(event) {
            //Highlight selected tab.
            $(this).parent().siblings().children(this.tagName).highlight(this);
    
            //Show results table matching tab index.
            $("#results > div").hide().eq($(".tabs.navigation:first a").index(this)).show();
    
            event.preventDefault();
	    }).mousedown(function(event) {
            event.preventDefault();
        })
        //Trigger click event of first enabled tab.
        .filter(":first").click();
    
        //Attach behaviour to disabled tabs.
        $(this).find("a.disabled").click(function(event) {
            event.preventDefault();
        }).mousedown(function(event) {
            event.preventDefault();
        });
        
        //Trigger click event of last selected tab
        var showTab = new QueryString(window.location.toString()).get("SD");
        if (showTab) {
          $(this).find('a').eq(showTab).click();
        }
    });
  
    //#Attach asset type checkbox logic.
    var alltypes = $("#search_col_left :checkbox[value='all']");
    var types = $("#search_col_left :checkbox:not([value='all'])");
    alltypes.click(function() {
        types.attr("checked", this.checked);
    });
    types.click(function() {
        alltypes.attr("checked", types.filter(":checked").length == types.length);
    });
    
    //#Attach exchanges checkbox and select field logic.
    var exchanges = $("#search_col_right select:first");
    //Stores array of selected exchanges.
    var selectedExchanges;
    $("#search_col_right :checkbox:first").click(function() {
        if (this.checked) {
            selectedExchanges = exchanges.val();
            exchanges.children().attr("selected", true);
        }
        else if (selectedExchanges) exchanges.val(selectedExchanges);
    });
    exchanges.change(function() {
        $("#search_col_right :checkbox:first").attr("checked",
            $(this).children(":selected").length == $(this).children().length);
    });
});

$.fn.highlight = function(e, c) {
    //Default class.
    if (!c) c = "selected";
    
    //Remove class from each element.
    $(this).removeClass(c);
    //Add class to the passed element.
    $(e).addClass(c);
    
    return this;
};