/**
* Toggles the check state of a group of boxes
*
* Checkboxes must have an id attribute in the form cb0, cb1...
* @param The number of box to 'check'
*/
function checkAll( n ) {
	var f = document.adminForm;
	var c = f.toggle.checked;
	var n2 = 0;
	for (i=0; i < n; i++) {
		cb = eval( 'f.cb' + i );
		if (cb) {
			cb.checked = c;
			n2++;
		}
	}
	if (c) {
		document.adminForm.boxchecked.value = n2;
	} else {
		document.adminForm.boxchecked.value = 0;
	}
}

function listItemTask( id, task ) {
	var f = document.adminForm;
	cb = eval( 'f.' + id );
	if (cb) {
		cb.checked = true;
		submitbutton(task);
	}
	return false;
}

function isChecked(isitchecked){
	if (isitchecked == true){
		document.adminForm.boxchecked.value++;
	}
	else {
		document.adminForm.boxchecked.value--;
	}
}

/**
* Default function.  Usually would be overriden by the component
*/
function submitbutton(pressbutton) {
	submitform(pressbutton);
}

/**
* Submit the admin form
*/
function submitform(pressbutton){
	document.adminForm.task.value=pressbutton;
	try {
		document.adminForm.onsubmit();
		}
	catch(e){}
	document.adminForm.submit();
}

// JS Calendar
var calendar = null; // remember the calendar object so that we reuse
// it and avoid creating another

// This function gets called when an end-user clicks on some date
function selected(cal, date) {
	cal.sel.value = date; // just update the value of the input field
}

// And this gets called when the end-user clicks on the _selected_ date,
// or clicks the "Close" (X) button.  It just hides the calendar without
// destroying it.
function closeHandler(cal) {
	cal.hide();			// hide the calendar

	// don't check mousedown on document anymore (used to be able to hide the
	// calendar when someone clicks outside it, see the showCalendar function).
	Calendar.removeEvent(document, "mousedown", checkCalendar);
}

// This gets called when the user presses a mouse button anywhere in the
// document, if the calendar is shown.  If the click was outside the open
// calendar this function closes it.
function checkCalendar(ev) {
	var el = Calendar.is_ie ? Calendar.getElement(ev) : Calendar.getTargetElement(ev);
	for (; el != null; el = el.parentNode)
	// FIXME: allow end-user to click some link without closing the
	// calendar.  Good to see real-time stylesheet change :)
	if (el == calendar.element || el.tagName == "A") break;
	if (el == null) {
		// calls closeHandler which should hide the calendar.
		calendar.callCloseHandler(); Calendar.stopEvent(ev);
	}
}

// This function shows the calendar under the element having the given id.
// It takes care of catching "mousedown" signals on document and hiding the
// calendar if the click was outside.
function showCalendar(id) {
	var el = document.getElementById(id);
	if (calendar != null) {
		// we already have one created, so just update it.
		calendar.hide();		// hide the existing calendar
		calendar.parseDate(el.value); // set it to a new date
	} else {
		// first-time call, create the calendar
		var cal = new Calendar(true, null, selected, closeHandler);
		calendar = cal;		// remember the calendar in the global
		cal.setRange(1900, 2070);	// min/max year allowed
		calendar.create();		// create a popup calendar
	}
	calendar.sel = el;		// inform it about the input field in use
	calendar.showAtElement(el);	// show the calendar next to the input field

	// catch mousedown on the document
	Calendar.addEvent(document, "mousedown", checkCalendar);
	return false;
}

//--------------------------------------------------------------------------------------

  var timerID = null;

  function getObj(objid) 
  {
    if (document.getElementById)
      return document.getElementById(objid)
    if (document.all)
      return document.all[objid]
    if (document.layers)
      return document.layers[objid]
    return null
  }

  function ScrollUp(elementName, speed, step) 
  {
    var el = getObj(elementName);
	var elPos = parseInt(el.style.top);
	
    if (el != null) 
	{
      if (isNaN(elPos)) 
	  {
        el.style.top = "0px";
      }
      if (elPos < 0) 
	  {
        if ((elPos + step) > 0) 
		{
          el.style.top = "0px";
        }
        else 
		{
          var changePlacement = elPos + step;
		  el.style.top = changePlacement+"px";
        }
      }
      ScrollStop();
      timerID = setTimeout("ScrollUp('" + elementName + "', " + speed + ", " + step + ")", speed);
    }
  }

  function ScrollDown(elementName, speed, step) 
  {
    var el = getObj(elementName);
	var elPos = parseInt(el.style.top);
	var elParentHeight = el.parentNode.offsetHeight;
	var elHeight = el.offsetHeight;
	
    if (el != null) 	
	{
      if (isNaN(elPos)) 
	  {
        el.style.top = "0px";
      }
      if (elPos > elParentHeight - elHeight) 
	  {
        if ((elPos - step) < elParentHeight - elHeight) 
		{
          var changePlacement = elParentHeight - elHeight;
		  el.style.top = changePlacement+"px";
        }
        else 
		{
          var changePlacement = elPos - step;
		  el.style.top = changePlacement+"px";
        }
      }
      ScrollStop();
      timerID = setTimeout("ScrollDown('" + elementName + "', " + speed + ", " + step + ")", speed);
    }
  }

  function ScrollStop() {
    if (timerID != null) {
      clearTimeout(timerID);
      timerID = null;
    }
  }


//--------------------------------------------------------------------------------------