var S_LAST_TAB = "tab1";
function TShow(s_layer_name) 
{
	var o_Layer=document.getElementById(s_layer_name);
		o_Layer.style.display="block";
}

function THide(s_layer_name) 
{
	var o_Layer=document.getElementById(s_layer_name);
		o_Layer.style.display="none";
}

function TShowNext(s_tab_name) 
{
	document.getElementById(S_LAST_TAB).className = 'tab_inactive tab';
	
	var o_Curr_Tab = document.getElementById(s_tab_name);
		o_Curr_Tab.className='tab_current tab';
	THide(S_LAST_TAB+'_data');
	TShow(s_tab_name+'_data');
	S_LAST_TAB=s_tab_name;
}