var Behaviour = {
	list : new Array,

	register : function(sheet){
		Behaviour.list.push(sheet);
	},

	start : function(){
		Behaviour.addLoadEvent(function(){
			Behaviour.apply();
		});
	},

	apply : function(){
		for (h=0;sheet=Behaviour.list[h];h++){
			for (selector in sheet){
				list = document.getElementsBySelector(selector);

				if (!list){
					continue;
				}

				for (i=0;element=list[i];i++){
					sheet[selector](element);
				}
			}
		}
	},

	addLoadEvent : function(func){
		var oldonload = window.onload;

		if (typeof window.onload != 'function') {
			window.onload = func;
		} else {
			window.onload = function() {
				oldonload();
				func();
			}
		}
	}
}

Behaviour.start();

function getAllChildren(e) {
	// Returns all children of element. Workaround required for IE5/Windows. Ugh.
	return e.all ? e.all : e.getElementsByTagName('*');
}

document.getElementsBySelector = function(selector) {
	// Attempt to fail gracefully in lesser browsers
	if (!document.getElementsByTagName) {
		return new Array();
	}
	// Split selector in to tokens
	var tokens = selector.split(' ');
	var currentContext = new Array(document);
	for (var i = 0; i < tokens.length; i++) {
		token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
		if (token.indexOf('#') > -1) {
			// Token is an ID selector
			var bits = token.split('#');
			var tagName = bits[0];
			var id = bits[1];
			var element = document.getElementById(id);
			if (tagName && element.nodeName.toLowerCase() != tagName) {
				// tag with that ID not found, return false
				return new Array();
			}
			// Set currentContext to contain just this element
			currentContext = new Array(element);
			continue; // Skip to next token
		}
		if (token.indexOf('.') > -1) {
			// Token contains a class selector
			var bits = token.split('.');
			var tagName = bits[0];
			var className = bits[1];
			if (!tagName) {
				tagName = '*';
			}
			// Get elements matching tag, filter them for class selector
			var found = new Array;
			var foundCount = 0;
			for (var h = 0; h < currentContext.length; h++) {
				var elements;
				if (tagName == '*') {
					elements = getAllChildren(currentContext[h]);
				} else {
					elements = currentContext[h].getElementsByTagName(tagName);
				}
				for (var j = 0; j < elements.length; j++) {
					found[foundCount++] = elements[j];
				}
			}
			currentContext = new Array;
			var currentContextIndex = 0;
			for (var k = 0; k < found.length; k++) {
				if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {
					currentContext[currentContextIndex++] = found[k];
				}
			}
			continue; // Skip to next token
		}
		// Code to deal with attribute selectors
		if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
			var tagName = RegExp.$1;
			var attrName = RegExp.$2;
			var attrOperator = RegExp.$3;
			var attrValue = RegExp.$4;
			if (!tagName) {
				tagName = '*';
			}
			// Grab all of the tagName elements within current context
			var found = new Array;
			var foundCount = 0;
			for (var h = 0; h < currentContext.length; h++) {
				var elements;
				if (tagName == '*') {
					elements = getAllChildren(currentContext[h]);
				} else {
					elements = currentContext[h].getElementsByTagName(tagName);
				}
				for (var j = 0; j < elements.length; j++) {
					found[foundCount++] = elements[j];
				}
			}
			currentContext = new Array;
			var currentContextIndex = 0;
			var checkFunction; // This function will be used to filter the elements
			switch (attrOperator) {
				case '=': // Equality
				checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
				break;
				case '~': // Match one of space seperated words
				checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
				break;
				case '|': // Match start with value followed by optional hyphen
				checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
				break;
				case '^': // Match starts with value
				checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
				break;
				case '$': // Match ends with value - fails with "Warning" in Opera 7
				checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
				break;
				case '*': // Match ends with value
				checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
				break;
				default :
				// Just test for existence of attribute
				checkFunction = function(e) { return e.getAttribute(attrName); };
			}
			currentContext = new Array;
			var currentContextIndex = 0;
			for (var k = 0; k < found.length; k++) {
				if (checkFunction(found[k])) {
					currentContext[currentContextIndex++] = found[k];
				}
			}
			// alert('Attribute Selector: '+tagName+' '+attrName+' '+attrOperator+' '+attrValue);
			continue; // Skip to next token
		}

		if (!currentContext[0]){
			return;
		}

		// If we get here, token is JUST an element (not a class or ID selector)
		tagName = token;
		var found = new Array;
		var foundCount = 0;
		for (var h = 0; h < currentContext.length; h++) {
			var elements = currentContext[h].getElementsByTagName(tagName);
			for (var j = 0; j < elements.length; j++) {
				found[foundCount++] = elements[j];
			}
		}
		currentContext = found;
	}
	return currentContext;
}

function optimizePrice(price) {
	var newprice = (Math.round(price*100)/100).toString();
	if (newprice.replace('.',',').match(',') == null) {
		var newprice = newprice+'.00';
	}
	else if (newprice.split('.')[1].length != 2) {
		var newprice = newprice+'0';
	}
	return newprice;
}

function updatePriceAantal(element) {
	var min = document.getElementById('minaantal').innerHTML * 1;
	var a = element.value;
	if (a < min) {
		alert('Het door u ingevoerde getal voldoet niet aan de minimale besteleisen ('+min+').');
		element.value = min;
		a = min;
	}
	var b = document.getElementById('subtotal').innerHTML * 1;
	var c = a * b;
	var d = optimizePrice(c);
	document.getElementById('total').innerHTML = d;
}

function updatePriceOpties(element) {
	var a = document.getElementById('subtotal').innerHTML;
	var b = element.value.split(',')[1];
	var a = a * 1;
	var b = b * 1;

	if (element.checked == true) {
		var c = a + b;
	}
	else {
		var c = a - b;
	}

	var d = optimizePrice(c);
	document.getElementById('subtotal').innerHTML = d;

	var a = document.getElementById('aantal').value * 1;

	var b = document.getElementById('subtotal').innerHTML * 1;

	var c = a * b;

	var d = optimizePrice(c);
	document.getElementById('total').innerHTML = d;
}

function deleteOption(id) {
	if (confirm('Weet u zeker dat u deze optie wilt verwijderen?')) {
		document.getElementById('opties').removeChild(document.getElementById(id));
		if (id.toString().match('d') == null) {
			if (document.getElementById('deletedoptions').value == '') {
				document.getElementById('deletedoptions').value = id;
			}
			else	{
				document.getElementById('deletedoptions').value += ' '+id;
			}
		}
	}
}

// Behaviours
var myrules = {
	'a' : function(element){
		element.onfocus = function() {
			element.blur();
		}
	},
	'.item input' : function(element){
		element.onfocus = function(){
			if (element.value == 'zoeken') {
				element.value = '';
			}
		}
		element.onblur = function(){
			if (element.value == '') {
				element.value = 'zoeken';
			}
		}
	},
	'.optie' : function(element){
		element.onclick = function(){
			updatePriceOpties(element);
		}
	},
	'.aantal' : function(element){
		element.value = document.getElementById('minaantal').innerHTML * 1;
		element.onblur = function(){
			updatePriceAantal(element);
		}
	},
	'#bestel' : function(element){
		element.onclick = function(){
			document.getElementById('bestellen').submit();
			return false;
		}
	},
	'#contactbutton' : function(element){
		element.onclick = function(){
			document.getElementById('contactform').submit();
			return false;
		}
	},
	'input[type="checkbox"]' : function(element){
		element.checked = false;
	},
	'.verwijderitem' : function(element){
		element.onclick = function(){
			if (!confirm('Weet u zeker dat u dit item wilt verwijderen?')) {
				return false;
			}
		}
	},
	'.verwijdermandje' : function(element){
		element.onclick = function(){
			if (!confirm('Weet u zeker dat u uw hele winkelmandje wilt verwijderen?')) {
				return false;
			}
		}
	},
	'#search' : function(element){
		element.onsubmit = function(){
			var url = window.location.href.split('/');
			if (element.search.value == '') {
				element.search.value = '-';
			}

			if (url[3] == 'zoeken') {
				url[4] = element.search.value;
				newurl = url.join('/');
			}
			else {
				newurl = '/zoeken/'+element.search.value+'/-/-/-/name-ASC/';
			}
			window.location.href = newurl;
			return false;
		}
	},
	'#extraoptie' : function(element){
		element.onclick = function(){
			var opties = document.getElementById('opties').getElementsByTagName('h4');
			var lengte = opties.length + 1;
			div = document.createElement('div');
			div.className = 'optie_wijzig';
			div.id = 'd'+lengte;
			div.innerHTML = '<a class="deleteoptie" href="javascript: deleteOption(\'d'+lengte+'\');"><img src="/images/icons/delete2.png" alt="Verwijderen" /></a><table><tr><td>Naam</td><td><input type="text" name="optionname[]" maxlength="35" /></td></tr><tr><td>Afbeelding</td><td><input type="file" name="optionimage[]"/></td></tr><tr><td>Beschrijving</td><td><textarea name="optiondescription[]"></textarea></td></tr><tr><td>Verborgen?</td><td><input type="checkbox" name="optionhidden[]" /></td></tr><tr><td colspan="2"><input type="hidden" name="optionid[]" value="d'+lengte+'" /></td></tr><tr><td>Btw</td><td><input type="text" name="optionbtw[]" maxlength="35" value="0.19" /></td></tr><tr><td>Prijs</td><td><input type="text" name="optionprice[]" /></td></tr></table>';
			document.getElementById('opties').appendChild(div);
			return false;
		}
	},
	'.delete' : function(element){
		element.onclick = function(){
			if (!confirm('Weet u zeker dat u dit product wil verwijderen?')) {
				return false;
			}
		}
	}

}

Behaviour.register(myrules);