function gr(co){	
	document.getElementById('cf1').style.backgroundImage="url(img/main_link.png)";
	document.getElementById('cf2').style.backgroundImage="url(img/main_link.png)";
	document.getElementById('cf3').style.backgroundImage="url(img/main_link.png)";
	document.getElementById('cf1').style.color="#c4c4c4";
	document.getElementById('cf2').style.color="#c4c4c4";
	document.getElementById('cf3').style.color="#c4c4c4";
	
	document.getElementById('gk1').style.display="none";
	document.getElementById('gk2').style.display="none";
	document.getElementById('gk3').style.display="none";
	
	document.getElementById('cf'+co+'').style.backgroundImage="url(img/main_link_hover.png)";
	document.getElementById('cf'+co+'').style.color="#ffffff";
	document.getElementById('gk'+co+'').style.display="block";
}

function tabs1()
{
 document.getElementById('tabs1').style.display='block';
 document.getElementById('tabs2').style.display='none';
 }
function tabs2()
{
 document.getElementById('tabs1').style.display='none';
 document.getElementById('tabs2').style.display='block';
 }