var active_hidden_text_opi = "";
function $(id)   
{   
return document.getElementById(id);   
}   
  
function showopi(id)   
{   
   var child = $(id);   
   var currentStyle = child.style.display;   
    if(currentStyle=='none')
    {      
       child.style.display='block';   
    }   
    else   
    {   
      child.style.display='none';   
    } 
	if (active_hidden_text_opi != "" && active_hidden_text_opi != id) {
		document.getElementById(active_hidden_text_opi).style.display = 'none';
	}
	if(active_hidden_text == id) {
		document.getElementById(active_hidden_text_opi).style.display = 'block';
	}
	active_hidden_text_opi = id;
	
}