function ToSearchPage(page)
{
	var frm = document.getElementById("postbackform");
	if(frm != null)
	{
		frm.page.value = page;
		frm.submit();
	}
}

var purchases = Array();
var editPart = -1;

function AddPart(form)
{
	if(form != null)
	{
		// It's all OK
		if(CheckFields(form))
		{
			if(editPart >= 0)
			{
				var nr = editPart;
			}
			else
			{
				var nr = purchases.length;
			}
			purchases[nr] = Array();
			purchases[nr][0] = form.omschrijving.value;
			purchases[nr][1] = form.motortype.value;
			purchases[nr][2] = form.bouwjaar.value;
			purchases[nr][3] = form.aantal.value;
			for(var i = 0; i < form.nieuw_gebruikt.length; i++)
			{
				if(form.nieuw_gebruikt[i].checked)
				{
					form.nieuw_gebruikt[i].checked = false;
					purchases[nr][4] = form.nieuw_gebruikt[i].value;
				}
			}

			form.omschrijving.value = form.motortype.value = form.bouwjaar.value = form.aantal.value = '';
			editPart = -1;

			UpdateTotal(form);
		}
	}
}

function EditPart(form)
{
	if(form != null)
	{
		if(CheckNumeric(form.wijzig.value, 1, true))
		{
			var w = form.wijzig.value;
			if(w <= purchases.length)
			{
				editPart = w - 1;

				form.omschrijving.value = purchases[editPart][0];
				form.motortype.value = purchases[editPart][1];
				form.bouwjaar.value = purchases[editPart][2];
				form.aantal.value = purchases[editPart][3];
				for(var i = 0; i < form.nieuw_gebruikt.length; i++)
				{
					if(form.nieuw_gebruikt[i].value == purchases[editPart][4])
					{
						form.nieuw_gebruikt[i].checked = true;
						i = form.nieuw_gebruikt.length; // Break out the loop
					}
				}
			}
		}

		form.wijzig.value = '';
	}
}

function DeletePart(form)
{
	if(form != null)
	{
		if(editPart <= purchases.length && editPart != -1)
		{
			var copy = purchases;
			purchases = Array();
			var j = 0;
			for(var i = 0; i < copy.length; i++)
			{
				if(i != editPart)
				{
					purchases[j++] = copy[i];
				}
			}

			form.omschrijving.value = form.motortype.value = form.bouwjaar.value = form.aantal.value = '';
			for(var i = 0; i < form.nieuw_gebruikt.length; i++)
			{
				if(form.nieuw_gebruikt[i].checked)
				{
					form.nieuw_gebruikt[i].checked = false;
				}
			}

			UpdateTotal(form);
		}
	}
}

function UpdateTotal(form)
{
	if(form != null && form.totaal != null)
	{
		form.totaal.value = '';
		for(var i = 0; i < purchases.length; i++)
		{
			form.totaal.value = form.totaal.value + "Onderdeel " + (i + 1) + "\n\n" +
				"Omschrijving   : " + purchases[i][0] + "\n" +
				"Motortype      : " + purchases[i][1] + "\n" +
				"Bouwjaar       : " + purchases[i][2] + "\n" +
				"Aantal         : " + purchases[i][3] + "\n" +
				"Nieuw/gebruikt : " + purchases[i][4] + " onderdeel\n" +
				"\n--------------------------\n";
		}
	}
}

function CheckFields(form)
{
	var ret = false;
	if(form != null)
	{
		if(form.omschrijving.value == '')
		{
			alert('Vul s.v.p. een omschrijving in');
			form.omschrijving.focus();
		}
		else if(form.motortype.value == '')
		{
			alert('Vul s.v.p. het motortype in');
			form.motortype.focus();
		}
		else if(form.bouwjaar.value == '' || !CheckNumeric(form.bouwjaar.value, 4, false))
		{
			alert('Vul s.v.p. een bouwjaar in (0000 bij onbekent)');
			form.bouwjaar.focus();
		}
		else if(form.aantal.value == '' || !CheckNumeric(form.aantal.value, 1, true))
		{
			alert('Vul s.v.p. het aantal in');
			form.aantal.focus();
		}
		else if(!CheckRadioButton(form.nieuw_gebruikt))
		{
			alert('Geef s.v.p. aan of het om een nieuw of gebruikt onderdeel gaat');
		}
		else
		{
			ret = true;
		}
	}

	return ret;
}

/**
 * val: The value
 * length: The length of the value
 * isMinLength: Is <length> the minimum length?
 **/
function CheckNumeric(val, length, isMinLength)
{
	var ret = false;
	var re = /^\d+$/;
	if(re.exec(val))
	{
		if(isMinLength)
		{
			if(val.length >= length)
			{
				ret = true;
			}
		}
		else
		{
			if(val.length == length)
			{
				ret = true;
			}
		}
	}

	return ret;
}

function CheckRadioButton(b)
{
	var ret = false;
	for (var i = 0; i < b.length && !ret; i++)
	{
		if (b[i].checked)
		{
			ret = true;
		}
	}

	return ret;
}

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_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_findObj(n, d) { //v4.0
  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 && document.getElementById) x=document.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_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
	if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
	obj.visibility=v; }
}