var navName = navigator.appName;
var brVer = navigator.userAgent; 
var brNum; 
var reg = new RegExp('/');
var ns = document.layers ? true : false;

function verNumIE() 
{
   var brVerId = brVer.indexOf('MSIE');
   brNum = brVer.substr(brVerId,8);
}


function verNumOt() 
{
   var brVerId = brVer.search(reg);
   brNum = brVer.substring(brVerId+1);
}


function showLayers()
{
	for(t=0; t<=arguments.length-1; t++)
	{
		if (ns)
	    {
	       document.layers[arguments[t]].visibility="show";
	    }
	    else
	    {
	       //document.all[arguments[t]].style.visibility = "visible";
		   document.getElementById(arguments[t]).style.visibility="visible";
        }
	}
}
				
function hideLayers()
{
	for(t=0; t<=arguments.length-1; t++) 
	{
		if (ns)
		{
            document.layers[arguments[t]].visibility="hide";
		}
		else
		{
			//document.all[arguments[t]].style.visibility = "hidden";
			document.getElementById(arguments[t]).style.visibility="hidden";
		}
	}
}



function showLayers()
{
	for(t=0; t<=arguments.length-1; t++)
	{
		if (ns)
	    {
	       document.layers[arguments[t]].visibility="show";
	    }
	    else
	    {
	       //document.all[arguments[t]].style.visibility = "visible";
		   document.getElementById(arguments[t]).style.visibility="visible";
        }
	}
}
				
function hideLayers()
{
	for(t=0; t<=arguments.length-1; t++) 
	{
		if (ns)
		{
            document.layers[arguments[t]].visibility="hide";
		}
		else
		{
			//document.all[arguments[t]].style.visibility = "hidden";
			document.getElementById(arguments[t]).style.visibility="hidden";
		}
	}
}

function loadImages()
{
	nav_products = new Image();
	nav_products.src = "../images/nav_1lvl/products.gif";

	nav_products_o = new Image();
	nav_products_o.src = "../images/nav_1lvl/products_o.gif";
	
	nav_sales = new Image();
	nav_sales.src = "../images/nav_1lvl/sales.gif";

	nav_sales_o = new Image();
	nav_sales_o.src = "../images/nav_1lvl/sales_o.gif";

	nav_support = new Image();
	nav_support.src = "../images/nav_1lvl/support.gif"

	nav_support_o = new Image();
	nav_support_o.src = "../images/nav_1lvl/support_o.gif"

	nav_services = new Image();
	nav_services.src = "../images/nav_1lvl/services.gif";

	nav_services_o = new Image();
	nav_services_o.src = "../images/nav_1lvl/services_o.gif";

	nav_careers = new Image();
	nav_careers.src = "../images/nav_1lvl/careers.gif";

	nav_careers_o = new Image();
	nav_careers_o.src = "../images/nav_1lvl/careers_o.gif";

	nav_about = new Image();
	nav_about.src = "../images/nav_1lvl/about.gif";

	nav_about_o = new Image();
	nav_about_o.src = "../images/nav_1lvl/about_o.gif";

	nav_news = new Image();
	nav_news.src = "../images/nav_2lvl/news.gif";

	nav_news_o = new Image();
	nav_news_o.src = "../images/nav_2lvl/news_o.gif";

	nav_contact = new Image();
	nav_contact.src = "../images/nav_2lvl/contact.gif";

	nav_contact_o = new Image();
	nav_contact_o.src = "../images/nav_2lvl/contact_o.gif";

	nav_background = new Image();
	nav_background.src = "../images/nav_2lvl/background.gif";

	nav_background_o = new Image();
	nav_background_o.src = "../images/nav_2lvl/background_o.gif";
}



function isNull ( )
{
	var strData = arguments[ 0 ];
    //alert(strData);
	return strData == null ? true : (strData == "" ? true : strData.match ( /^\s+$/ ) != null )
}