/*
 * Oldschool functions used for image swapping and preloading
 */
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

/*
 * This function is for cross-browser compatibility
 *		var grp_name = getElement("grp_name");
 *		if( !grp_name ) alert('Error getting object: grp_name'); else grp_name.value = "";
 */
function getElement(elementName)
{
	var thisElement = false;

	if (document.getElementById)  // this is the way the standards work
		thisElement = document.getElementById(elementName);
	else if (document.all)        // this is the way old msie versions work
		thisElement = document.all[elementName];
	else if (document.layers)     // this is the way nn4 works
		thisElement = document.layers[elementName];

	return thisElement;
}

/*
 * Used by the pwc1.3 windows script to open a popup window
 */
function showPopup(winType, winTitle, winContent, winWidth, winHeight)
{
  var win = new Window({className: "alphacube", title: winTitle, width: winWidth, height: winHeight});
  switch (winType)
  {
    case "URL":
      win.setURL(winContent+'?id='+win.getId())
      break;
    case "DIV":
      win.getContent().innerHTML = document.getElementById(winContent).innerHTML;
      break;
    case "VAR":
      win.getContent().innerHTML = winContent;
      break;
  }

  win.setDestroyOnClose();
  win.showCenter(true);
  win.setConstraint(false, {left:0, right:0, top:0, bottom:0});
  win.toFront();
}

/*
 * Used by the pwc1.3 windows script to open a dialog window
 */
function showDialog(div, func, parameters)
{
  Dialog.confirm($(div_id).innerHTML, {className:"alphacube", width:350,
                                        okLabel: "OK", cancelLabel: "Cancel",
                                        onOk:function(win) {call_user_func_array(func, parameters);}
                                       });
}

/*
 * Returns the keycode of the key pressed by the user
 */
function captureClick(e)
{
  var key;

  if(window.event)
    key = window.event.keyCode; //IE
  else
    key = e.which;              //Firefox

  return key;
}


// return the value of the radio button that is checked
// return an empty string if none are checked, or
// there are no radio buttons
function getCheckedValue(radioObj) {
  if(!radioObj)
    return "";
  var radioLength = radioObj.length;
  if(radioLength == undefined)
    if(radioObj.checked)
      return radioObj.value;
    else
      return "";
  for(var i = 0; i < radioLength; i++) {
    if(radioObj[i].checked) {
      return radioObj[i].value;
    }
  }
  return "";
}

// set the radio button with the given value as being checked
// do nothing if there are no radio buttons
// if the given value does not exist, all the radio buttons
// are reset to unchecked
function setCheckedValue(radioObj, newValue) {
  if(!radioObj)
    return;
  var radioLength = radioObj.length;
  if(radioLength == undefined) {
    radioObj.checked = (radioObj.value == newValue.toString());
    return;
  }
  for(var i = 0; i < radioLength; i++) {
    radioObj[i].checked = false;
    if(radioObj[i].value == newValue.toString()) {
      radioObj[i].checked = true;
    }
  }
}


function trimAll(sString)
{
  while (sString.substring(0,1) == ' ') {
    sString = sString.substring(1, sString.length);
  }
  while (sString.substring(sString.length-1, sString.length) == ' ') {
    sString = sString.substring(0,sString.length-1);
  }

  return sString;
}

// Extends the js array object to enable searching the array
// If the item is found, the corresponding key is returned.
// Be sure to test for false with === instead of ==
Array.prototype.array_search = function (s)
{
  for( var i=0; i<this.length; i++ )
  {
    if(this[i] == s) return i;
  }

  return false;
};

Number.prototype.isNull = function (s)
{
  return (s==null);
};