/*
function checkall(field)
{
for (i = 0; i < field.length; i++)
	field[i].checked = true ;
}

function uncheckall(field)
{
for (i = 0; i < field.length; i++)
	field[i].checked = false ;
}
*/




checked=false;
function checkedAll (checks) {
	var aa= document.getElementById('checks');
	 if (checked == false)
          {
           checked = true
          }
        else
          {
          checked = false
          }
	for (var i = 1; i < aa.elements.length; i++) 
	{
	 aa.elements[i].checked = checked;
	}
      }