function nav()
{
	var el = $('categories');
	if (!el)
	{
		return false;
	}

	for (var i=0; (li = el.childNodes[i]); i++)
	{
		if (li.nodeName == 'LI' && li.getElementsByTagName('ul')[0])
		{
			li.onmouseover = function(e) { this.className = 'over'; };
			li.onmouseout = function(e) { this.className = ''; };
		}
	}
}

function externalLinks()
{
	for (var i=0; (a = document.getElementsByTagName('a')[i]); i++)
	{
		if (a.getAttribute('rel') == 'external')
		{
			a.target= '_blank';
		}
	}
}

var Dostawcy = {
	obrazki: new Array('aseptico','bioresearch','d-tec','cattani','digora-optime','digora-pct','fimet','finndent','galbiati','csnindustrie','lminstruments','scican', 'soredex','tekscan','waterlase', 'ye-shine', 'biolase'),
	path: '/images/dostawcy/',
	ext: 'png',
	pointer: null,
	img: null,
	initialize: function() 
	{
		el = $('supplier-logo');
		if (!el)
		{
			return false;
		}
		
		this.img = el;
		this.pointer = 0;		
		this.changeImage();
	},
	changeImage: function()
	{
		var path = Dostawcy.path + Dostawcy.obrazki[Dostawcy.pointer] + "." + Dostawcy.ext;
		
		var img = new Image();
		img.src = path;

		$('supplier-logo').src = path;
		if (Dostawcy.pointer >= 11)
		{
			Dostawcy.pointer = 0;
		}
		else
		{
			Dostawcy.pointer++;
		}		
		
		img.onload = function() 
		{
			var x = document.createElement('img');
			x.width = 136;
			x.height = 92;
			x.id = 'supplier-logo';
			x.src = this.src;
			Element.remove('supplier-logo');
			$('supplier-logo-container').appendChild(x);
			window.setTimeout("Dostawcy.changeImage()", 5000 ); 
		}
	}
}