function redirectWebshop() {
	var form = document.getElementById('formpje');
	if(!form) {
		return false;
	}

	var checks = form.getElementsByTagName('input'); 
	var checkedboxes = new Array();
	
	for(var i = 0; i < checks.length; i++) {
		if(checks[i].checked) {
			checkedboxes[ checkedboxes.length ] = checks[i].value;
		}
	}
	
	if( checkedboxes.length < 1 ) {
		alert('U moet op zijn minst 1 box selecteren voordat u kunt bestellen.');
		return false;
	}
	
	var str = form.action;
	for(var c = 0; c < checkedboxes.length; c++) {
		str += checkedboxes[c];
		if( c != checkedboxes.length - 1 ) {
			str += ',';
		}
	}

	location.href = str;
	
}