function ddown(ly,img)
	{ 
 	i=1;
    	while (document.getElementById("tab"+i))
 	{
	document.getElementById("tab"+i).style.display='none';
	i++;
	}
 	document.getElementById("tab"+ly).style.display='block';
	document.getElementById("img"+ly).src='/images/'+img+'-o.jpg';
	}
	
function dhide(ly,img)	
	{
 	document.getElementById("tab"+ly).style.display='none';
	document.getElementById("img"+ly).src='/images/'+img+'.jpg'; 
	}

function preload() {
		document.write('<div style="display:none;"><img src="/images/bttn-about-us.jpg" /><img src="/images/bttn-about-us-o.jpg" /><img src="/images/bttn-about-us-dd.gif" /><img src="/images/bttn-about-us-o.jpg" alt="" /><img src="/images/bttn-alfa-lab-o.jpg" alt="" /><img src="/images/bttn-business-focus-o.jpg" alt="" /><img src="/images/bttn-crm-solution-o.jpg" alt="" /><img src="/images/bttn-it-focus-o.jpg" alt="" /><img src="/images/bttn-partner-focus-o.jpg" alt="" /><img src="/images/bttn-about-us-dd.gif" alt="" /><img src="/images/bttn-alfa-lab-dd.gif" alt="" /><img src="/images/bttn-business-focus-dd.gif" alt="" /><img src="/images/bttn-crm-solution-dd.gif" alt="" /><img src="/images/bttn-it-focus-dd.gif" alt="" /><img src="/images/bttn-partner-focus-dd.gif" alt="" /></div>');
}