function click_active(tab){
	if(tab=="tab_auto"){
		document.getElementById("auto").className='select';		
	}
	else
	{
		document.getElementById("auto").className='';			
	}
	if(tab=="tab_telex"){
		document.getElementById("telex").className='select';		
	}
	else
	{
		document.getElementById("telex").className='';			
	}
	if(tab=="tab_telex"){
		document.getElementById("telex").className='select';		
	}
	else
	{
		document.getElementById("telex").className='';			
	}
	if(tab=="tab_vni"){
		document.getElementById("vni").className='select';		
	}
	else
	{
		document.getElementById("vni").className='';			
	}
	if(tab=="tab_off"){
		document.getElementById("off").className='select';		
	}
	else
	{
		document.getElementById("off").className='';			
	}
}