if (document.images) {
    homeicon_on         = new Image;
    homeicon_off        = new Image;
    contacticon_on      = new Image;
    contacticon_off     = new Image;
    
    homeicon_on.src     = "../media/icons_03.gif";
    homeicon_off.src    = "../media/icons_01.gif";
    contacticon_on.src  = "../media/icons_04.gif";
    contacticon_off.src = "../media/icons_02.gif";
    
    about_on            = new Image;
    about_off           = new Image;
    why_on              = new Image;
    why_off             = new Image;
    products_on         = new Image;
    products_off        = new Image;
    tips_on             = new Image;
    tips_off            = new Image;
    
    about_on.src        = "../media/sub_09_on.gif";
    about_off.src       = "../media/sub_09.gif";
    why_on.src          = "../media/sub_10_on.gif";
    why_off.src         = "../media/sub_10.gif";
    products_on.src     = "../media/sub_11_on.gif";
    products_off.src    = "../media/sub_11.gif";
    tips_on.src         = "../media/sub_12_on.gif";
    tips_off.src        = "../media/sub_12.gif";
    
    nav_about_ehrhart_on            = new Image;
    nav_about_ehrhart_off           = new Image;
    nav_about_propane_on              = new Image;
    nav_about_propane_off             = new Image;
    nav_products_on         = new Image;
    nav_products_off        = new Image;
    nav_tips_on             = new Image;
    nav_tips_off            = new Image;
    
    nav_about_ehrhart_on.src    = "../media/menu_home_about_ehrhart_on.gif";
    nav_about_ehrhart_off.src   = "../media/menu_home_about_ehrhart.gif";
    nav_about_propane_on.src    = "../media/menu_home_about_propane_on.gif";
    nav_about_propane_off.src   = "../media/menu_home_about_propane.gif";
    nav_products_on.src         = "../media/menu_home_our_products_on.gif";
    nav_products_off.src        = "../media/menu_home_our_products.gif";
    nav_tips_on.src             = "../media/menu_home_tips_tricks_on.gif";
    nav_tips_off.src            = "../media/menu_home_tips_tricks.gif";

} 
else {
    homeicon_on         = "";
    homeicon_off        = "";
    contacticon_on      = "";
    contacticon_off     = "";
    
    about_on            = "";
    about_off           = "";
    why_on              = "";
    why_off             = "";
    products_on         = "";
    products_off        = "";
    tips_on             = "";
    tips_off            = "";

    nav_about_on            = "";
    nav_about_off           = "";
    nav_why_on              = "";
    nav_why_off             = "";
    nav_products_on         = "";
    nav_products_off        = "";
    nav_tips_on             = "";
    nav_tips_off            = "";
}

function PopUpWindow(url,name,ht,wdt) {
    window.open(url,'MyWindow','toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,width='+wdt+',height='+ht+',left=20,top=20');
  }