//get ie6
function IsIE6()
{
    if (/MSIE (\d+\.\d+);/.test(navigator.userAgent))
    { //test for MSIE x.x;
        var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
        if (ieversion<7)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}


//left nav layers
function fncShowLeftNavLayer(layer)
{
    if(document.getElementById(layer).style.display == "none")
    {
        document.getElementById(layer).style.display = "block";
    }
    else
    {
        document.getElementById(layer).style.display = "none";
    }
    
    fncDownArrow(layer);
}

var aryNavTitleLayer = new Array("divTitleContainerRestaurants","divTitleContainerRetail","divTitleContainerHistoric","divTitleContainerArt","divTitleContainerParks","divTitleContainerOther");
var aryNavTitleStyle = new Array("titleLeftNavBlue","titleLeftNavRed","titleLeftNavBrown","titleLeftNavPurple","titleLeftNavGreen","titleLeftNavGrey");
var strNavTitleStyleDefault = "titleLeftNavDefault";
var aryNavLayer = new Array("navRestaurants","navRetail","navHistoric","navArt","navParks","navOther");
var aryNavImageID = new Array("imgRestaurantsArrow","imgRetailArrow","imgHistoricArrow","imgArtArrow","imgParksArrow","imgOtherArrow");
//used for IE6
var aryNavArrow = new Array("/images/common/arrows_ie6/arrow_left_nav_default.gif","/images/common/arrows_ie6/arrow_left_nav_default.gif","/images/common/arrows_ie6/arrow_left_nav_default.gif","/images/common/arrows_ie6/arrow_left_nav_default.gif","/images/common/arrows_ie6/arrow_left_nav_default.gif","/images/common/arrows_ie6/arrow_left_nav_default.gif");
var aryNavDownArrow = new Array("/images/common/arrows_ie6/arrow_down_left_nav_blue.gif","/images/common/arrows_ie6/arrow_down_left_nav_red.gif","/images/common/arrows_ie6/arrow_down_left_nav_brown.gif","/images/common/arrows_ie6/arrow_down_left_nav_purple.gif","/images/common/arrows_ie6/arrow_down_left_nav_green.gif","/images/common/arrows_ie6/arrow_down_left_nav_grey.gif");

function fncDownArrow(layer)
{
    for(var i = 0; i < aryNavLayer.length; i++)
    {
        if(aryNavLayer[i] == layer)
        {
            if(document.getElementById(layer).style.display == "block")
            {
                if(IsIE6())
                {
                    document.getElementById(aryNavImageID[i]).src = aryNavDownArrow[i];
                }
                else
                {
                    document.getElementById(aryNavImageID[i]).src = "/images/common/arrow_down_nav_white.png";
                }
                document.getElementById(aryNavTitleLayer[i]).className = aryNavTitleStyle[i];
            }
            else
            {
                if(IsIE6())
                {
                    document.getElementById(aryNavImageID[i]).src = aryNavArrow[i];
                }
                else
                {
                    document.getElementById(aryNavImageID[i]).src = "/images/common/arrow_nav_white.png";
                }
                document.getElementById(aryNavTitleLayer[i]).className = strNavTitleStyleDefault;
            }
        }
    }
}

//for ie6
function fncReplacePNGOnLoad()
{
    if(IsIE6())
    {
        for(var i = 0; i < aryNavImageID.length; i++)
        {
            if(aryNavImageID[i] == 'imgRestaurantsArrow')
            {
                document.getElementById(aryNavImageID[i]).src = aryNavDownArrow[i];
            }
            else
            {
                document.getElementById(aryNavImageID[i]).src = aryNavArrow[i];
            }
        }
    }
}