function Checkboxes_InvertAll(FormName) {
	/*
	Purpose
		Used to invert the value of all checkboxes in the specified form.
	Parameters
		FormName (string) = The name of the form we're working with.
	Version History
		1.00 2009.6.24 Tested by Russ Tanner on IE6/FF3.
	*/
	
	var frm = document.forms[FormName]
	var c = frm.elements.length;
	for(var i=0; i<c; i++) {
		if (frm.elements[i].type == 'checkbox') frm.elements[i].checked = !frm.elements[i].checked;
	}
}