function changeTab(name)
{
	for (var i = 0; i < tabs.length; i++)
	{ 
         $('tab_content_'+tabs[i]).style.display='none';
         $('tab_li_'+tabs[i]).className='';
    } 
    
    $('tab_content_'+name).style.display='';
    $('tab_li_'+name).className='selected';
}