function hideshowdiv(div_id,div_array)
{
   document.getElementById(div_id).style.display='block';
   for (i=0;i<div_array.length;i++)
     {
             if(document.getElementById(div_array[i]).style.display=='block')
             {document.getElementById(div_array[i]).style.display='none';}
     }

}