//***********************************************
//File: utility.js
//Purpose: General functions used throughout site
//***********************************************

//------------------------------------------
//Function: clearDefault
//Purpose: clears default value of input box
//------------------------------------------
function clearDefault(el) {
if (el.defaultValue==el.value) el.value = ""
}

//------------------------------------------------------------------
//Function: restoreDefaultNum
//Purpose: restores default value of input box plus validates number
//------------------------------------------------------------------
function restoreDefaultNum(el) {
	if (el.value < 0 || el.value.length == 0 || isNaN(el.value))
	el.value = el.defaultValue;
}

//-----------------------------------------
//Function: Macromedia Image Functions
//Purpose: various rollover image functions
//-----------------------------------------
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];}}
}

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: openViewer
//Purpose: function to open window based on type of image
//Open viewer in appropriate sized windows and center on screen
//-------------------------------------------------------------
function openViewer(strViewer, strURL)
{
	// Initialise defaults
	var strScroll = "no";

	//Get viewer properties
	switch (strViewer)
	{
		case "vt":
			var intWidth = 565, intHeight = 420;
			break;

		case "fp":
			var intWidth = 685, intHeight = 495;
			break;

		case "pb":
			var intWidth = 530, intHeight = 512;
			break;

		case "ss":
			var intWidth = 530, intHeight = 597;

			// Check screen size
			if (screen.height < 700)
			{
				var strScroll = "yes";
				intWidth = 550, intHeight = 497;
			}

			break;
	}

	//Get center co-ordinates
	var intLeft = (screen.width) ? (screen.width - intWidth) / 2 : 0;
	var intTop = (screen.height) ? (screen.height - intHeight) /2 : 0;

	//open viewer window
	var strSettings = "height=" + intHeight + ",left=" + intLeft + ",top=" + intTop + ",width=" + intWidth + ",resizeable=0,scrollbars=" + strScroll;
	window.open(strURL, "_blank", strSettings)
}

//-------------------------------
//Function: toggle
//Purpose: Shows or Hides a panel
//-------------------------------
function toggle(id)
{
	var aString = 'ad_' + id;

	if(document.getElementById(aString).style.display=='none')
	{
		document.getElementById(aString+'_link').innerHTML = '-';
		document.getElementById(aString).style.display = '';
	}
	else
	{
		document.getElementById(aString+'_link').innerHTML = '+';
		document.getElementById(aString).style.display = 'none';
	}
}

//--------------------------------
//Function: confirmMsg
//Purpose: Confirmation dialog box
//--------------------------------
function confirmMsg(msg) {
	
	var MyResult;
	
	if (typeof(Page_ClientValidate) == 'function'){
		Page_ClientValidate();
		MyResult = Page_IsValid;
	}
	else {
		MyResult = true;
	}

	if(MyResult != false) {
	MyResult = confirm(msg);
	}
	
	return MyResult;
}

//-----------------------------------------
//Function: setHiddenfieldValue
//Purpose: sets the value of a hidden field
//-----------------------------------------
var setHiddenfieldValue= function(fieldName,val)
{document.getElementById(fieldName).value=val;}

//-----------------------------------------------------------
//Function: setMultiHiddenfieldValue
//Purpose: sets the value of a hidden field with multi-select
//-----------------------------------------------------------
var setMultiHiddenfieldValue= function(fieldName,fieldMulti)
{
	var obj = document.getElementById(fieldMulti);
	var outArray = new Array();

	for (var i=0; i<obj.options.length; i++) {
		if (obj.options[i].selected) {outArray.push(obj.options[i].value);}
	}
	document.getElementById(fieldName).value=outArray;
}

//----------------------------------------------------------------
//	textCounter() - Counts character-limit remaining for input box
//----------------------------------------------------------------
function textCounter(fieldName, countfield, maxlimit) {

	var obj = document.getElementById(fieldName)
	var objcount = document.getElementById(countfield)

	if (obj.value.length > maxlimit) // if too long...trim it!
	obj.value = obj.value.substring(0, maxlimit);
	// otherwise, update 'characters left' counter
	else 
	objcount.value = maxlimit - obj.value.length;
}

//--------------------------------------------------------------------------
//	popDisplayAddress() - Set the Display Address to the Address Line 1
//--------------------------------------------------------------------------
function popDisplayAddress(addrName, dispName){

	var objAddr = document.getElementById(addrName)
	var objDisp = document.getElementById(dispName)

	objDisp.value = objAddr.value;
}

//--------------------------------------------------------------------------
//	toggleVisibility() - toggles visibility of element
//--------------------------------------------------------------------------
function toggleVisibility(id, type) {
	el = document.getElementById(id);
	if(el.style){
		if(type == 'on'){el.style.display = 'inline';} else {el.style.display = 'none';}
	} else {
		if(type == 'on'){el.display = 'inline';} else {el.display = 'none';}
	}
}

//--------------------------------------------------------------------------
//	SelectAll() - ticks or unticks a group of checkboxes
//--------------------------------------------------------------------------
function SelectAll(CheckBoxControl){
	if (CheckBoxControl.checked == true){
		var i;
		for (i=0; i < document.forms[0].elements.length; i++){
			if (document.forms[0].elements[i].type == 'checkbox'){
				document.forms[0].elements[i].checked = true;
			}
		}
	}
	else{
		var i;
		for (i=0; i < document.forms[0].elements.length; i++){
			if (document.forms[0].elements[i].type == 'checkbox'){
				document.forms[0].elements[i].checked = false;
			}
		}
	}
}

//------------------------------------------------------------------------------
//	roomChangeNewDev() - Refresh the unit details table when a change is made
//------------------------------------------------------------------------------
function roomChangeNewDev(Name1, Name2, Name3, Name4, Name5, dispName){

	var objName1 = document.getElementById(Name1)
	var objName2 = document.getElementById(Name2)
	var objName3 = document.getElementById(Name3)
	var objName4 = document.getElementById(Name4)
	var objName5 = document.getElementById(Name5)
	var objDisp = document.getElementById(dispName)

	//Update the total values after any change
	objDisp.value = parseInt(objName1.value) + parseInt(objName2.value) + parseInt(objName3.value) + parseInt(objName4.value) + parseInt(objName5.value);
}

//----------------------------------
//	mortCalc() - Mortgage calculator
//----------------------------------
function mortCalc(loan,apr,yr,monthly) {

	var l = document.getElementById(loan);
	var r = document.getElementById(apr);
	var y = document.getElementById(yr);
	var ttl = document.getElementById(monthly);

	LoanAmount = l.value;
	DownPayment= "0";
	AnnualInterestRate = r.value/100;
	Years = y.value; 
	MonthRate = AnnualInterestRate/12; 
	NumPayments = Years*12;
	Prin = LoanAmount-DownPayment;
	MonthPayment = Math.floor((Prin*MonthRate)/(1-Math.pow((1+MonthRate),(-1*NumPayments)))*100)/100;
	ttl.value = MonthPayment;
}