var isNav, isIE;

if (navigator.appName == "Netscape")
{
  if ( navigator.appVersion.charAt(0) == "5" )
  {
    // browser is putatively a v5 browser
	isIE = true;
  }
  else
  {
 	isNav = true;
  }
}
else
{
	isIE = true;
}

isamap = new Object();
isamap[0] = "_df"
isamap[1] = "_ov"
isamap[2] = "_ot"
isamap[3] = "_dn"

var info = new Object();
info ['butt_'] = "Site Help and Game Instructions"
info ['butt_1'] = "Current High Scores"
info ['butt_2'] = "Contact us via email form"
info ['butt_10'] = "About Easy Street Games"

if (document.images) // ensure browser can do JavaScript rollovers
{
	isimages = new Object();

	isimages.blnk = new Image();
	isimages.blnk.src = "images/blankbuttonimage.gif";

	isimages.clr = new Image();
	isimages.clr.src = "images/clear.gif";

	isimages.butt__df = new Image();
	isimages.butt__df.src = "images/butt_help.gif";

	isimages.butt__ov = new Image();
	isimages.butt__ov.src = "images/butt_helpov.gif";

	isimages.butt_1_df = new Image();
	isimages.butt_1_df.src = "images/butt_high_scores.gif";

	isimages.butt_1_ov = new Image();
	isimages.butt_1_ov.src = "images/butt_high_scoresov.gif";

	isimages.butt_2_df = new Image();
	isimages.butt_2_df.src = "images/butt_contact_us.gif";

	isimages.butt_2_ov = new Image();
	isimages.butt_2_ov.src = "images/butt_contact_usov.gif";

	isimages.butt_3_df = new Image();
	isimages.butt_3_df.src = "images/butt_log_off.gif";

	isimages.butt_3_ov = new Image();
	isimages.butt_3_ov.src = "images/butt_log_offov.gif";

	isimages.butt_4_df = new Image();
	isimages.butt_4_df.src = "images/butt_log_on.gif";

	isimages.butt_4_ov = new Image();
	isimages.butt_4_ov.src = "images/butt_log_onov.gif";

	isimages.butt_5_df = new Image();
	isimages.butt_5_df.src = "images/butt_recover_info.gif";

	isimages.butt_5_ov = new Image();
	isimages.butt_5_ov.src = "images/butt_recover_infoov.gif";

	isimages.butt_6_df = new Image();
	isimages.butt_6_df.src = "images/butt_big_chat.gif";

	isimages.butt_6_ov = new Image();
	isimages.butt_6_ov.src = "images/butt_big_chatov.gif";

	isimages.butt_7_df = new Image();
	isimages.butt_7_df.src = "images/butt_games.gif";

	isimages.butt_7_ov = new Image();
	isimages.butt_7_ov.src = "images/butt_gamesov.gif";

	isimages.butt_8_df = new Image();
	isimages.butt_8_df.src = "images/butt_cancel.gif";

	isimages.butt_8_ov = new Image();
	isimages.butt_8_ov.src = "images/butt_cancelov.gif";

	isimages.butt_9_df = new Image();
	isimages.butt_9_df.src = "images/butt_sign_up.gif";

	isimages.butt_9_ov = new Image();
	isimages.butt_9_ov.src = "images/butt_sign_upov.gif";

	isimages.butt_10_df = new Image();
	isimages.butt_10_df.src = "images/butt_about_us.gif";

	isimages.butt_10_ov = new Image();
	isimages.butt_10_ov.src = "images/butt_about_usov.gif";

	isimages.butt_11_df = new Image();
	isimages.butt_11_df.src = "images/submitButtonUp.gif";

	isimages.butt_11_ov = new Image();
	isimages.butt_11_ov.src = "images/submitButtonRoll.gif";

	isimages.butt_12_df = new Image();
	isimages.butt_12_df.src = "images/logonButtonUp.gif";

	isimages.butt_12_ov = new Image();
	isimages.butt_12_ov.src = "images/logonButtonRoll.gif";
}

function isimgact(id, act)
{
      var layerName = (id == 'butt_11' || id == 'butt_12') ? 'mainPanel' : 'butts';
//	var imgs = isNav ? document.layers[layerName].document.images : document.images;
	var imgs = document.images;
	if (imgs)
	{
		imgs[id].src = eval( "isimages." + id + isamap[act] + ".src");
	}
	window.status = act == 1 ? info[id] : '';
	return true;
}