function resizeContentDiv() {
	var div = xGetElementById('contentDiv');
	var header = xGetElementById('headerTd');
	xHeight(div, xClientHeight()-xHeight(header));
}

function listenToResize() {
	xAddEventListener(window, "resize", resizeContentDiv);
}

function printPage() {
	var div = xGetElementById('contentDiv');
	xHeight(div, div.scrollHeight);
	window.print();
	resizeContentDiv();
}

function getRadioValue(form, element) {
  var elmts = document.forms[form].elements;

  for (var i = 0; i < elmts.length; i++)
    if (elmts[i].name == element && elmts[i].checked)
      return elmts[i].value;

  return null;
}

function emptystr(string) {
	var x = 0;
	var chr;
	var empty = true;
	if (string.length) {
		do {
			chr = string.substring(x, x + 1);
			x++;
			empty = (chr == ' ' || chr == '\t' || chr == '\n' || chr == '\r');
		} while (empty && x < string.length);
	}
	return empty;
}