// Select all check boxes
function checkA(frm, cName) 
{
	for (i=0,n=frm.elements.length;i<n;i++)
	{
		if (frm.elements[i].className.indexOf(cName) !=-1)
		{
			if (frm.elements[i].checked == true) 
				frm.elements[i].checked = false;
			else 
				frm.elements[i].checked = true;
		}
	}
}