// The JavaScript Junkyard
// interesting and semi-useful JS snippets
// from scottandrew.com/junkyard/js/
// copyright 2001 scott andrew lepera, damn you!

// addEvent and removeEvent
// cross-browser event handling for IE5+,  NS6 and Mozilla

function addEvent(elm, evType, fn, useCapture)
{
  if (elm.addEventListener) { // dom standard
    elm.addEventListener(evType, fn, useCapture);
    return true;
  }
  else if (elm.attachEvent) { // ie
    var r = elm.attachEvent("on" + evType, fn);
    return r;
  }
  else {
    alert("Handler could not be added");
  }
}

function removeEvent(elm, evType, fn, useCapture)
{
  if (elm.removeEventListener) {
    elm.removeEventListener(evType, fn, useCapture);
    return true;
  }
  else if (elm.detachEvent) {
    var r = elm.detachEvent("on" + evType, fn);
    return r;
  }
  else {
    alert("Handler could not be removed");
  }
}
/** End JavaScript Junkyard */

// checks for specific browser version, variable and dom support

this.ver = navigator.appVersion;
this.agent = navigator.userAgent
this.dom = document.getElementById?1:0
this.ie8 = (this.ver.indexOf("MSIE 8") > -1 && this.dom)?1:0;
this.ie7 = (this.ver.indexOf("MSIE 7") > -1 && this.dom)?1:0;
this.ie5 = (this.ver.indexOf("MSIE 5") > -1 && this.dom)?1:0;
this.ie6 = (this.ver.indexOf("MSIE 6") > -1 && this.dom)?1:0;
this.ie4 = (document.all && !this.dom)?1:0;
this.ie = this.ie4 || this.ie5 || this.ie6 || this.ie7 || this.ie8
this.mac = this.agent.indexOf("Mac") > -1
this.opera5 = this.agent.indexOf("Opera 5") > -1
this.ns6 = (this.dom && parseInt(this.ver) >= 5) ?1:0;
this.ns4 = (document.layers && !this.dom)?1:0;
this.bw = (this.ie8 ||this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5 || this.dom)

/**
 * Safely copy value into an existing field.
 */
 
function safeCopyValue(element, value) {
  if (document.forms[0].elements[element])
    document.forms[0].elements[element].value = value;
}

/**
 * Clear and give focus to the specified lookup field. Lookup fields must conform to the following name convention:
 * [field]Name (example: personName)
 * [field]Id (example: personId)
 */
function clearLookupField(field) {
  safeCopyValue(field + "Id", "");
  safeCopyValue(field + "Name", "");
  if (document.forms[0].elements[field + "Name"])
    document.forms[0].elements[field + "Name"].focus();
}

/**
 * Make use of the add element cross browser function with multiples
 * elements of the same type.
 */
function addEventByNames(tagName, evType, fn, useCapture) {
  elements = document.getElementsByTagName(tagName);
  for (var i = 0; i < elements.length; i++) {
    addEvent(elements[i], evType, fn, useCapture);
  }
}

/**
 * Submit current form on ENTER key press event.
 */
function doSaveOnEnter(evt) {
  var code = 0;
  if (evt) // dom
    code = evt.keyCode;
  else if (window.event && window.event.keyCode) // ie
    code = window.event.keyCode;

  if (code == 13) { // ENTER KEY = 13
    doSave();
  }
  else {
    return true;
  }
}

/**
 * Submit form.
 */
function doSave() {
  safeCopyValue("action", "save");
  document.forms[0].submit();
}

function doSaveAndCancel(id) {
  safeCopyValue("action", "cancel");
  var changed = "N";
  try {
      changed = document.forms[0].elements["changed"].value;
  } catch(e) {
    // ignore
  }
  if (changed == "Y") {
    if (confirm("???egms.globals.messages.changeAware???")) {
      safeCopyValue("action", "saveAndCancel");
    }
  }
  document.forms[0].submit();
}

function doCancel() {
  safeCopyValue("action", "cancel");  
  document.forms[0].submit();
}















/**
 * Hide selected element.
 */
function hideElement(element) {
  var obj = (typeof element == "string") ? document.getElementById(element) : element;
  obj.style.display = "none";
}

function hideSection(event, element) {
  var strName;
  if (element != null) {
    strName = element;
  }
  else {
    strName = getTargetElement(event).name;
  }

  for (var i = 1; i < 12; i++) {
    if (document.getElementById(strName + "Container" + i))
      hideElement(strName + "Container" + i);
  }

}

function putHideTriggerYesNo(element) {
  var obj = (typeof element == "string") ? document.getElementById(element) : element;

  if (obj == null) return;

  addEvent(obj, "click", hideSection, false);

  // hide section on loading when option checked
  if (obj.checked) {
    var strName = obj.name;
    strName = strName.replace("No");
    strName = strName.replace("Yes");
    hideSection(null, strName);
  }
}

/**
 * Show selected element.
 */
function showElement(element) {
  var obj = (typeof element == "string") ? document.getElementById(element) : element;
  obj.style.display = "";
}

function showSection(event, element) {
  var strName;
  if (element != null) {
    strName = element;
  }
  else {
    strName = getTargetElement(event).name;
  }

  for (var i = 1; i < 15; i++) {
    if (document.getElementById(strName + "Container" + i))
      showElement(strName + "Container" + i);
  }

}

function putShowTriggerYesNo(element) {
  var obj = (typeof element == "string") ? document.getElementById(element) : element;

  if (obj == null) return;
  addEvent(obj, "click", showSection, false);

  // hide section on loading when option checked
  if (obj.checked) {
    var strName = obj.name;
    strName = strName.replace("No");
    strName = strName.replace("Yes")
    showSection(null, strName);
  }
}

/**
 * Compatibility function to get event target element.
 */
function getTargetElement(event) {
  if (event != null)
    return event.target || event.srcElement;
  else return null;
}

/**
 * Open a new browser window.
 */
function doPopup(url) {
  newwindow = window.open(url, '', 'width=800,height=750,resizable=true,scrollbars=true,toolbar=false,location=false,status=true,directories=false');
}

/**
 * Add a new array file input to a zone in the web page named <input>Container. The
 * count for the array must be held in a hidden input named <input>Counter.
 */
function addArrayFileInput(element) {
  if (!dom) return;

  // grab the dom container in which we must add the file input
  var container = document.getElementById(element + 'Container');

  // grab the dom counter and make sure its initialized
  var counter = document.getElementById(element + 'Counter');
  if (!counter.value)
    counter.setAttribute("value", "0");

  // prepare the dom structure
  var arrayName = element + "[" + counter.value + "]";
  var divInput = document.createElement("div");
  var space = document.createTextNode(" ");
  var removeLink = document.createElement("a");
  removeLink.setAttribute("href", "javascript:removeArrayFileInput('" + arrayName + "')");
  var removeLinkText = document.createTextNode("remove");
  removeLink.appendChild(removeLinkText);

  // create the file input
  var fileInput = document.createElement("input");
  fileInput.setAttribute("type", "file");
  fileInput.setAttribute("name", arrayName);
  fileInput.setAttribute("id", arrayName);

  // append the file input and link into the prepared div into to the container
  divInput.appendChild(fileInput);
  divInput.appendChild(space);
  divInput.appendChild(removeLink);
  container.appendChild(divInput);

  // increment counter for next
  counter.value = parseInt(counter.value) + 1;
}

/**
 * Remove the array file input element from the document dom.
 */
function removeArrayFileInput(arrayElement) {
  if (!dom) return;

  // grab the file input dom element
  var fileInput = document.getElementById(arrayElement);
  // grab the container's parent and remove the child
  var container = fileInput.parentNode;
  var containerParent = container.parentNode;
  containerParent.removeChild(container);
}

/**
 * Call delete attachments service with an array of ids. Attachments to delete must
 * be named <element>Delete and checkboxes. This function differs to deleteDocumentStudies
 * as it calls specific deleteDocumentXxx actions, it always delete the same attachment
 * type in the same form.
 */
function deleteDocuments(element, url) {
  if (!dom) return;

  var newUrl = url;

  // grap all elements named <element>Delete
  var elements = document.getElementsByName(element + "Delete");
  var params = "";

  // build params with the checked attachments to delete
  for (var i = 0; i < elements.length; i++) {
    var attachmentToDelete = elements[i];
    if (attachmentToDelete.checked == true) {
      newUrl = addParameter(newUrl, "id", attachmentToDelete.value);
    }
  }

  // call delete attachments service
  window.location = newUrl;
  
}

/**
 * Add a parameter to an url.
 */
function addParameter(url, parameterName, parameterValue) {
  var newUrl;
  var parameterString = url.replace(/.*\?(.*)/, "$1");
  var parameterTokens = parameterString.split("&");
  if (url.indexOf("?") != -1) {
    newUrl = url + "&";
  } else {
    newUrl = url + "?";
  }
  newUrl = newUrl + parameterName + "=" + parameterValue;
  return newUrl;
}