function hidify_showify(e_table, e_img, alt_less, alt_more, exp) {
   if(document.getElementById) { //DOM compliant browser?
      var id_table = document.getElementById(e_table).style;
      var id_img = document.getElementById(e_img);
	if (exp =='expand')
	{
		if (id_table.display == '')
		{
			id_table.display = 'block';
		}
		
	}	

	  var temp = id_table.display;

         if(id_table.display == "block" || id_table.display == "table-cell") {
            id_table.display = "none";
            id_img.src = "./plus.gif";
            id_img.alt = alt_more;
         }
         else {
            id_table.display = "block";
            id_img.src = "./minus.gif";
            id_img.alt = alt_less;
         }

  	  var temp = id_table.display;

      return false;

   }
   else {
      return true;
   }
}