function toggleTabs()
{
	var tds = document.getElementById('travelNav').getElementsByTagName('td');  
	for(var i=0; i<tds.length; i++)
	{
		if(tds[i].className == 'tabOff')
		{
			tds[i].onmouseover = function()
			{
				this.className = 'tabOn';			
			};	              
			
			tds[i].onmouseout = function()
			{
			    this.className = 'tabOff';	
			};
			
			tds[i].onclick = function()
			{
				location.href = this.firstChild.href;	
			};
		}	
	}	
}