function ChangeActive(active) {	
	if (active == 1) {
		document.getElementById("l1").className = "active";
		Show('tab1');		
	}
	else {
		document.getElementById("l1").className = "";
		Block('tab1');		
	}	
	
	if (active == 2) {
		document.getElementById("l2").className = "active";
		Show('tab2');	
	} 
	else {
		document.getElementById("l2").className = "";	
		Block('tab2');
	}
	
	if (active == 3) {
		document.getElementById("l3").className = "active";
		Show('tab3');
	} 
	else {
		document.getElementById("l3").className = "";
		Block('tab3');	
	}	
}

function Show(id) {   
    document.getElementById(id).style.display = 'block'; 	    
}

function Block(id) {
	document.getElementById(id).style.display = 'none';
}