function findObject(objectId)
{
	if(window.document.getElementById && window.document.getElementById(objectId))
		return window.document.getElementById(objectId);
	else if (window.document.all && window.document.all(objectId))
		return window.document.all(objectId);
	else if (window.document.layers && window.document.layers[objectId]) 
		return window.document.layers[objectId];
	else
		return null;
}

function selectInput(item)
{
	try
	{
		if (item != null && item.value != '')
		{
			item.select();
			item.focus();
		}
	}
	catch(e) {}
}

function checkCookies()
{
	try
	{
		var today = new Date();
		var expire = new Date();
		expire.setTime(today.getTime() + 3600000*24);
		document.cookie = 'acceptcookie=true;expires='+expire.toGMTString();
		
		var theCookie=''+document.cookie;
		var ind=theCookie.indexOf('acceptcookie');
		return ind != -1;
	}
	catch(e) { return false; }
}


function getFormData(formName)
{
	var _form = null;
	var _responseBody = '';
	var _elm = null;
		
	if (typeof(findObject)=='function')
	{
		_form = findObject(formName);
	}
	else
	{
		alert('Form object ' + formName + ' could not be found');
	}

	if (_form == null)
		return null;
		
	for(i=0;i<_form.elements.length;i++)
	{
		_elm = _form.elements[i];

		switch(_elm.type)
		{
			case 'submit'	: break;
			case 'checkbox' :
			case 'radio' :
			{
				if(_elm.checked == true)
					_responseBody += '&'+ encodeURIComponent(_elm.name)+'='+encodeURIComponent(_elm.value);
				break;
			}
			default :
			{
				_responseBody += '&'+ encodeURIComponent(_elm.name)+'='+encodeURIComponent(_elm.value);
				break;
			}
		}	
	}
	
	return _responseBody;
}


window.onload = function()
{	
	if (typeof(pngFix) == 'function')
	{
		pngFix();
	}
		
	if (typeof(initLightbox) == 'function')
	{
		initLightbox();
	}
	
	window.setInterval("KeepAlive()", 300000);
}

function KeepAlive()
{
	try
	{
		PageMethods.KeepAlive(function(response){});
	}
	catch(e) { }
}

function AddToBasket(id)
{
	if (!allowShop())
		return false;
	
	var _formdata = (arguments[1]) ? getFormData(document.forms[0].id) : null;
	var _optiondata = (typeof(arguments[2]) != 'undefined') ? 'option=' + arguments[2] : null;	
	var _arguments = (_optiondata != null) ? _optiondata : (_formdata != null) ? _formdata : null;
	
	PageMethods.AddToBasket(id, _arguments, _formdata != null, function(response)
	{
		if (response < 0)
		{
			if (confirm('Dit product is reeds aanwezig in uw winkelmandje. Wilt u dit product nog een keer toevoegen?'))
			{
				PageMethods.AddToBasket(id, _arguments, true, function(response)
				{
					window.location.href = './Webshop.aspx';
				});
			}
		}
		else
		{		
			window.location.href = './Webshop.aspx';
		}
	});
	
	return false;
}

function changeOption(sUrl, oObj)
{
	try
	{	
		if (typeof(sUrl) != 'undefined' && typeof(oObj) != 'undefined' && typeof(oObj.value) != 'undefined' && !isNaN(parseInt(oObj.value)))
		{
			window.location.href = sUrl + '&option=' + oObj.value;
		}
	}
	catch(e)
	{
	}
}

function allowShop()
{
	if (checkCookies())
	{
		return true;
	}
	else
	{
		alert('Om gebruik te kunnen maken van deze webwinkel is het vereist dat uw browser cookies accepteert.');
		return false;
	}
}

var _submitButtonClicked = false;
function clickSubmitButton()
{
	if (_submitButtonClicked)
	{		
		return false;
	}
	else if (checkTerms())
	{		
		_submitButtonClicked = true;
		MoveToTop();
		return true;
	}
	else
	{
		return false;
	}
}


function checkTerms()
{
	if (!allowShop())
		return false;
		
	var obj = findObject('terms');
	if (obj != null && obj.checked)
	{
		return true;
	}
	else if (obj != null)
	{
		alert('U kunt de bestelling niet accorderen als u niet akkoord gaat met de algemene verkoopvoorwaarden');
		return false;
	}
	
	return false;
}

function MoveToTop()
{
	window.scroll(0,0);
}