function BuyBook() {

	bookID = getQueryVariable("BookId");
	if (bookID >= 17 && bookID <= 76) {
		ForwardTo = "http://www.costbook.com/products/info/hcf.htm";
	} else if (bookID == 1) {
		ForwardTo = "http://www.costbook.com/products/info/nce.htm";
	} else if (bookID == 4) {
		ForwardTo = "http://www.costbook.com/products/info/nee.htm";
	} else if (bookID == 5) {
		ForwardTo = "http://www.costbook.com/products/info/npc.htm";
	} else if (bookID == 6) {
		ForwardTo = "http://www.costbook.com/products/info/nph.htm";
	} else if (bookID == 8) {
		ForwardTo = "http://www.costbook.com/products/info/nri.htm";
	} else if (bookID == 9) {
		ForwardTo = "http://www.costbook.com/products/info/nrr.htm";
	} else if (bookID == 77) {
		ForwardTo = "http://www.costbook.com/products/info/nhi.htm";
	} else if (bookID == 78) {
		ForwardTo = "http://www.costbook.com/products/info/ncm.htm";
	} else if (bookID == 79) {
		ForwardTo = "http://www.costbook.com/products/info/nfc.htm";
	}

	window.open(ForwardTo);
}


function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
  alert('Query Variable ' + variable + ' not found');
}