function checkAll(input)
{
  count = document.newsform.elements.length;
  for (i=0; i < count; i++) 
	{
	  if(document.newsform.elements[i].name.substring(0,12) == "selectsingle")
	  {
	    document.newsform.elements[i].checked = input.checked? true:false;
	  }
	}
	
	
}