// ############################################################################
// ##
// ##  CUSTOM WEBSITE FUNCTIONS
// ##  (i.e. not standard white site functions)
// ##
// ############################################################################

// Put custom functions for your website here.

// ############################################################################
// ##
// ##  STANDARD WHITE SITE FUNCTIONS
// ##
// ############################################################################

// ####################################
// Navigation
// ####################################

// ====================
// Function:    NavPullDown
//
// Purpose:     Go to a URL that is selected from a form a pull-down form field
//
// Input:       strFormName - The ID of the form being used to select naviation
//              strFieldName - The ID of the field with URL select options
//
// Output:      Navigates to selected URL.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
// ====================
function NavFormSelect(strFormName,strFieldName) {
	intSelected = document[strFormName].elements[strFieldName].options.selectedIndex;
	strURL = document[strFormName].elements[strFieldName].options[intSelected].value;
	document[strFormName].elements[strFieldName].options.selectedIndex = 0;
	if (strURL != "") {
		location.href = strURL;
	}
}

// ####################################
// Windows & Alerts
// ####################################

// ====================
// Function:    Popup
//
// Purpose:     Open a popup window with a series of option settings.
//
// Input:       strPage - The URL of the page to open in the popup window.
//              intWidth - The window width in pixels 
//              intHeight - The window height in pixels
//              strID - The ID of the popup window. (This is important if the
//                window may be called on by other functions or if there are
//                multiple popup windows in a site.)
//              strScrollbars - Switch visible scrollbars on/off ("yes"/"no")
//              strLocation - Switch visible location bar on/off ("yes"/"no")
//              strToolbar - Switch visible toolbar on/off ("yes"/"no")
//              strStatus - Switch visible status bar on/off ("yes"/"no")
//              strResizable - Window is resizable or not ("yes"/"no")
//
// Output:      Window opens containing the specified URL.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
// ====================
function Popup(strPage,intWidth,intHeight,strID,strScrollbars,strLocation,strToolbar,strStatus,strResizable) {
	if (!strPage) {
		strPage = "/";
	}
	if (!intWidth) {
		intWidth = 500;
	}
	if (!intHeight) {
		intHeight = 320;
	}
	if (!strID) {
		strID = "PopupWindow";
	}
	if (!strScrollbars) {
		strScrollbars = "yes";
	}
	if (!strLocation) {
		strLocation = "no";
	}
	if (!strToolbar) {
		strToolbar = "no";
	}
	if (!strStatus) {
		strStatus = "no";
	}
	if (!strResizable) {
		strResizable = "yes";
	}
	//if (isLoaded == 0)
	//{
	//	location.reload();
	//}
	idPopup = window.open(strPage,strID,"width="+intWidth+",height="+intHeight+",scrollbars="+strScrollbars+",location="+strLocation+",toolbar="+strToolbar+",status="+strStatus+",resizable="+strResizable);
	if (window.focus) {
		idPopup.focus();
	}
	return false;
}

// ====================
// Function:    PopdownLink
//
// Purpose:     Open a link in a popup window in a specified main window and
//              close the popup window. If the specified link window does not
//              exist it is created. If no window is specified the link is
//              targeted to the original opener of the popup window.
//
// Input:       strURL - The URL of the page to open
//              strWindowID - The ID of the window in which to open the link
//
// Output:      Navigates to selected URL in selected window and closes current
//              window.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
//              2004 Multiple window targets added. (Previously could only
//                   target the opener.)
// ====================
function PopdownLink(strURL,strWindowID) {
	if (!strWindowID) {
		top.opener.location.href = strURL;
	}
	else {
		if (strWindowID.location) {
			strWindowID.location.href = strURL;
		}
		else {
			window.open(strURL,strWindowID);
		}
	}
	top.close();
}

// ====================
// Function:    RequireKeywords
//
// Purpose:     Checks any search form to make sure keywords are entered before
//              the form can be submitted. 
//
// Input:       strFormName - The ID of the form with the keywords field in it
//              strFieldName - The ID of the keywords field within the form 
//
// Output:      Give an error if no keywords are presented.
//
// Assumptions: -
//
// History:     20040109 RW Created to replace local code in site templates.
// ====================
function RequireKeywords(strFormID,strFieldName) {
	if (document.forms[strFormID].elements[strFieldName].value.length <= 3) {
		alert("Please alter your requested keyword(s) in the search form.\nThe search phrase must be 3 characters or more in length.")
		return false;
	}
}

// ====================
// Function:    CS
//
// Purpose:     Display a "coming soon" message for sections of a website that
//              have not been created yet. This function is sometimes used in
//              development to make links active before a site is finished.
//
//              Note: This is an evil funciton, it should not be used! It
//              encourages bad development habits.
//
// Input:       -
//
// Output:      Show a "coming soon" message.
//
// Assumptions: -
//
// History:     DDSN created back in the Distant Past
// ====================
function CS() {
	alert("That function is coming soon.");
}

// ####################################
// Image Manipulation
// ####################################

// ====================
// Function:    ImageSwap
//
// Purpose:     Swap any image to another.
//
// Input:       strImageID - ID of the image being swapped
//              strNewImageSrc - Source of the new image being loaded
//
// Output:      Swaps images.
//
// Assumptions: Images with all specified IDs exist and are pre-loaded.
//
// History:     DDSN created back in the Distant Past
// ====================
function ImageSwap(strImageID,strNewImageSrc) {
	if (document.images) {
		document.images[strImageID].src = eval(strNewImageSrc+".src");
	}
}

// ====================
// Function:    ImageSwapFX
//
// Purpose:     Swap any image to another using an optional fade effect. Can
//              also be called with the transition effect disabled, i.e. just
//              swap the images.
//
// Input:       strImageID - ID of the image being swapped
//              strNewImageSrc - Source of the new image being loaded
//              blnDisableTrans - Switch the transition off or on (1/0)
//
// Output:      Swaps images with optional fade effect.
//
// Assumptions: - Images with all specified IDs exist and are pre-loaded.
//              - Requires fading transition style to be set first on image tag
//              - Only works for IE5.5+ but falls back nicely
//              - Javascript Globals: blnToggleTrans
//
// History:     2003 DDSN Created
//              2004 Updated with more standard naming structures
// ====================
function ImageSwapFX(strImageID,strNewImageSrc,blnDisableTrans) {
	if (blnDisableTrans || !document.images[strImageID].filters || blnIE50) {
		if (document.images) {
			document.images[strImageID].src = eval(strNewImageSrc+".src");
		}
	}
	else {
		// After setting Apply, changes to the object are not displayed
		// until Play is called.
		document.images[strImageID].filters[0].Apply();

		if (blnToggleTrans) {
			blnToggleTrans = 0;
			document.images[strImageID].src = eval(strNewImageSrc+".src");
		}
		else {
			blnToggleTrans = 1;
			document.images[strImageID].src = eval(strNewImageSrc+".src");
		}
		document.images[strImageID].filters[0].Play();
	}
}

// ####################################
// Layer Manipulation
// ####################################

// ====================
// Function:    LayerVisibility
//
// Purpose:     Turn visibility of any layer on or off.
//
// Input:       strLayerID - ID of the layer being altered
//              strState = "visible" or "hidden"
//
// Output:      Turns specified layer on or off.
//
// Assumptions: Specified layer exists in document hierarchy.
//
// History:     DDSN created back in the Distant Past
// ====================
function LayerVisibility(strLayerID,strState) {
	if (blnNS4) {
		if (document.layers[strLayerID]) {
			document.layers[strLayerID].visibility = strState;
		}
	}
	else if (blnDOM) {
		if (document.getElementById(strLayerID)) {
			document.getElementById(strLayerID).style.visibility = strState;
		}
	}
	else if (blnIE) {
		if (document.all[strLayerID]) {
			document.all[strLayerID].style.visibility = strState;
		}
	}
}

// ====================
// Function:    GetObjectWidth
//
// Purpose:     Returns the width of any passed in block level object
//
// Input:       ID of item
//
// Output:      Returns the width of any passed in block level object
//
// Assumptions: -
//
// History:     SC 2006-05-15
// ====================
function GetObjectWidth(objectRef) {
	var intWidth = -1;

	if (document.getElementById) {
		if (document.getElementById(objectRef)) {
			intWidth = eval(document.getElementById(objectRef).offsetWidth);
		}
	}
	else if (document.all) {
		if (document.all[objectRef]) {
			intWidth = document.all[objectRef].scrollWidth;
		}
	}
	else if (document.layers) {
		if (document[objectRef]) {
			intWidth = document[objectRef].clip.bottom;
		}
	}

	return intWidth;
}

// ====================
// Function:    GetObjectHeight
//
// Purpose:     Returns the height of any passed in block level object
//
// Input:       ID of item
//
// Output:      Returns the height of any passed in block level object
//
// Assumptions: -
//
// History:     SC 2006-05-15
// ====================
function GetObjectHeight(objectRef) {
	var intHeight = -1;

	if (document.getElementById) {
		if (document.getElementById(objectRef)) {
			intHeight = eval(document.getElementById(objectRef).offsetHeight);
		}
	}
	else if (document.all) {
		if (document.all[objectRef]) {
			intHeight = document.all[objectRef].scrollHeight;
		}
	}
	else if (document.layers) {
		if (document[objectRef]) {
			intHeight = document[objectRef].clip.bottom;
		}
	}

	return intHeight;
}

// ====================
// Function:    SetUniformHeight
//
// Purpose:     Sets a number of page objects to a uniform height, being the
//              maximum height of any of the given objects.
//
// Input:       strPageObjects - Comma separated list of object IDs that should
//              be set to a uniform height.
//
// Output:      Updates the height of the given objects.
//
// Assumptions: GetObjectHeight()
//
// History:     20060823 RW Created
// ====================
function SetUniformHeight(strPageObjects) {
	intMaxHeight = 0;

	if (strPageObjects) {
		arrPageObjects = strPageObjects.split(",");
	}

	if (arrPageObjects) {
		// Find the height of the tallest object.
		for (i = 0; i < arrPageObjects.length; i++) {
			intThisHeight = GetObjectHeight(arrPageObjects[i]);
			if (intThisHeight > intMaxHeight) {
				intMaxHeight = intThisHeight;
			}
		}

		// Set all the objects to the same (maximum) height if a height larger
		// than 0 was found.
		if (intMaxHeight > 0 ) {
			for (i = 0; i < arrPageObjects.length; i++) {
				if (blnIE)  {
					strMaxHeight = intMaxHeight;
				}
				else {
					strMaxHeight = intMaxHeight + 'px';
				}
				if(document.getElementById(arrPageObjects[i])) {
					document.getElementById(arrPageObjects[i]).style.height = strMaxHeight;
				}
			}
		}
	}

}

// ####################################
// Printing
// ####################################

// ====================
// Function:    LoadVBPrinter
//
// Purpose:     Load Visual Basic printing commands for VB enabled browsers.
//
// Input:       -
//
// Output:      Loads (writes out) visual basic printing functions.
//
// Assumptions: Javascript Globals: blnIE, blnCanPrint, blnMac
//
// History:     DDSN created back in the Distant Past
// ====================
//function LoadVBPrinter()
//{
	if (blnIE && !blnCanPrint && !blnMac) with (document) {
		writeln('<OBJECT ID="WB" WIDTH="0" HEIGHT="0" CLASSID="clsid:8856F961-340A-11D0-A96B-00C04FD705A2"></OBJECT>');
		writeln('<' + 'SCRIPT LANGUAGE="VBScript">');
		writeln('Sub window_onunload');
		writeln('    On Error Resume Next');
		writeln('    Set WB = nothing');
		writeln('End Sub');
		writeln('Sub vbPrintPage');
		writeln('    OLECMDID_PRINT = 6');
		writeln('    OLECMDEXECOPT_DONTPROMPTUSER = 2');
		writeln('    OLECMDEXECOPT_PROMPTUSER = 1');
		writeln('    On Error Resume Next');
		writeln('    WB.ExecWB OLECMDID_PRINT, OLECMDEXECOPT_DONTPROMPTUSER');
		writeln('End Sub');
		writeln('<' + '/SCRIPT>');
	}
//}

// ====================
// Function:    PrintPage
//
// Purpose:     Opens the print dialog window or shows a fallback message for
//              unsupported browsers
//
// Input:       -
//
// Output:      Opens the print dialog window or shows a fallback message for
//              unsupported browsers.
//
// Assumptions: Javascript Globals: blnCanPrint, blnIE, blnMac
//
// History:     DDSN created back in the Distant Past
// ====================
function PrintPage() {
	if (blnCanPrint) {
		window.print();
	}
	else if (blnIE && !blnMac) {
		vbPrintPage();
	}
	else {
		alert("Your web browser does not appear to support the automatic\nPrint function. To print this page, please select the \"Print\"\noption from the \"File\" menu of your web browser.");
	}
}


// Load Visual Basic printing commands for VB enabled browsers
//LoadVBPrinter()

// ####################################
// Custom scroller
// ####################################

//We wrap all the code in an object so that it doesn't interfere with any other code
var scroller = {
  init:   function() {
    if (document.getElementById("pagebody") && document.getElementById("pagebody-inner") && document.getElementById("scrollArea")) {

    //collect the variables
    scroller.docH = document.getElementById("pagebody-inner").offsetHeight;
    scroller.contH = document.getElementById("pagebody").offsetHeight;
    scroller.scrollAreaH = document.getElementById("scrollArea").offsetHeight;

    //calculate height of scroller and resize the scroller div
    //(however, we make sure that it isn't to small for long pages)
    scroller.scrollH = (scroller.contH * scroller.scrollAreaH) / scroller.docH;
    
    // Remember the scroller height...
    scroller.checkHeight = scroller.scrollH;
    
    //Set a minimum or fixed height for the scroller
    //if(scroller.scrollH < 57) scroller.scrollH = 57; // Minimum height
    scroller.scrollH = 57; // Fixed height
    document.getElementById("scroller").style.height = Math.round(scroller.scrollH) + "px";
	
    //what is the effective scroll distance once the scoller's height has been taken into account
    scroller.scrollDist = Math.round(scroller.scrollAreaH-scroller.scrollH);

    if (scroller.scrollAreaH < scroller.checkHeight) {
        //make the scrollbar invisible if the page is longer than the scroller
        document.getElementById("scrollArea").style.display = 'none';
    } else {
	
        //make the scroller div draggable
        Drag.init(document.getElementById("scroller"),null,0,0,-1,scroller.scrollDist);
        //add ondrag function
        document.getElementById("scroller").onDrag = function (x,y) {
          var scrollY = parseInt(document.getElementById("scroller").style.top);
          var docY = 0 - (scrollY * (scroller.docH - scroller.contH) / scroller.scrollDist);
          document.getElementById("pagebody-inner").style.top = docY + "px";

        }
    }
    
    }
  }
}

onload = scroller.init;

// ####################################
// Fun Stuff / Easter Eggs
// ####################################

// No easter eggs currently present. :-)