function toggle(ele) {
	var obj = document.getElementById(ele);
	if (obj.style.display == 'block') {
		obj.style.display = 'none';
	} else {
		obj.style.display = 'block';
	}
}

function placeCostHolder() {
	var str = 'Summa: <span id="sum">0.00</span> kr<br/>Moms: <span id="tax">0.00</span> kr<br/>Frakt: <span id="freight">0.00</span> kr<br/><span style="font-weight:bold;">Att betala: <span id="total">0.00</span> kr</span>';
	document.getElementById('costHolder').innerHTML = str;
}

function isNumberKey(evt) {
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57)) {
		return false;
	} else {
		return true;
	}
}

function calcSum(freight, taxrate) {
	var holder = document.getElementById('products');
	var inputs = holder.getElementsByTagName('input');
	var sum = 0;
	for (i=0; i<inputs.length; i++) {
		if (parseInt(inputs[i].value) > 0) {
			var partSum = parseInt(inputs[i].value) * inputs[i].className;
			sum += Math.round(partSum * 100) / 100;
		}
	}
	
	var tax = (sum * (1 + (taxrate / 100))) - sum;
	var tax = Math.round(tax * 100) / 100;
	
	var total = sum + tax + freight;
	var total = Math.round(total * 100) / 100;
	
	document.getElementById('sum').innerHTML = sum.toFixed(2);
	document.getElementById('tax').innerHTML = tax.toFixed(2);
	document.getElementById('freight').innerHTML = freight.toFixed(2);
	document.getElementById('total').innerHTML = total.toFixed(2);

}

/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};