function expandCollapse(elem)
{
	var x = Array("sub_0", "sub_1", "sub_2", "sub_3", "sub_4", "sub_5");
	
    if (document.getElementById)
    {
        e = document.getElementById(elem);		
        i = document.getElementById(elem + "Image");

        if (e.style.display == "none" | e.style.display == null | e.style.display == "")
        {			 
                e.style.display = "block";				
        }
        else if (e.style.display == "block")
        {			
                e.style.display = "block";
        }
        else
        {
                e.style.display = "block";
        }
		
		
		
       for(i=0; i< x.length;  i++)
	   {
		   if(e.id != x[i])
		   {			
		         var array_elem = document.getElementById(x[i]);						
			     if(array_elem.style.display == 'block')
				 {					 								
			         array_elem.style.display = 'none';
				}			
		   }
	   }	   
    }
}