// toggles form fields using a CSS styleswitcher
function setActiveStyleSheet(title) {

	document.cookie = "page=" + title;

  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) {
				a.disabled = false;
			}
    }
  }

}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) {
			return a.getAttribute("title");
		}
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("rel").indexOf("alt") == -1 && a.getAttribute("title")) {
			return a.getAttribute("title");
		}
  }
  return null;
}

// toggles div display and plus/minus sign images

function toggleDisplay(trid, imgid) {
	var objDiv = document.getElementById(trid);
	var objImg = document.getElementById(imgid);
	if (objDiv.style.display=="none") {
		objDiv.style.display="";
		objImg.src="images/minus.gif";
	} else {
		objDiv.style.display="none";
		objImg.src="images/plus.gif";
	}
}