function DoChecker (myform,category)
{
	var frm = myform;
	var bChecked = false;
	if (frm.elements[category + '_all'].checked)
	{
		bChecked = true;
	}
	for (var count = 0; count < frm.length; count++)
	{
		if (frm.elements[count].name == category)
		{
			frm.elements[count].checked = bChecked;
		}
	}
}