function add_item_option() {

	var element = document.getElementById('bestel_kleuren');
	var sb_num_products = parseInt(document.getElementById('sb_num_products').value);
	var rows = element.getElementsByTagName('a');
	sb_num_products = sb_num_products+1;
	document.getElementById('sb_num_products').value = sb_num_products;

	var rowelement = document.getElementById('bestel_kleuren');
	var addrows = rowelement.getElementsByTagName('tr');
	addrow_length = addrows.length-1;
	var addrow = addrows[addrow_length];

	var tmp = addrow.cloneNode(true);	
	addrow.parentNode.appendChild(tmp);

	new_html = addrows[1].innerHTML;

	new_html = new_html.toString();
	new_html = new_html.replace('kleur1', 'kleur'+eval(sb_num_products));
	new_html = new_html.replace('maat1', 'maat'+eval(sb_num_products));
	new_html = new_html.replace('aantal1', 'aantal'+eval(sb_num_products));
	new_html = new_html.replace('sizes1', 'sizes'+eval(sb_num_products));
	new_html = new_html.replace('getSizes(this, 1)', 'getSizes(this, '+eval(sb_num_products)+')');
	new_html = new_html.replace('<td style="visibility: visible;">', '');
	new_html = new_html.replace('<td>', '');
	new_html = new_html.replace('</td>', '');

	//rows[row_length].innerHTML = new_html;
	addrow_length = addrows.length-1;
	cell = addrows[addrow_length].getElementsByTagName('td')[0];

	cell.innerHTML = new_html; 

	for(var i = 0; i < rows.length; i++)
        {
	    var limit = i+1;
	    if(limit == parseInt(rows.length)){

	            rows[i].style.display = 'block';

	    }
	    else {
	
	            rows[i].style.display = 'none';

	    }
        }
	 
}

function remove_item_option(element) {

	var sb_num_products = parseInt(document.getElementById('sb_num_products').value);
	if(sb_num_products > 1){
	sb_num_products = sb_num_products-1;
	}
	document.getElementById('sb_num_products').value = sb_num_products;

	var element = document.getElementById('bestel_kleuren');
	var rows = element.getElementsByTagName('tr');
	row_2_remove = rows[rows.length];
	var row = row_2_remove;
	
	if(rows.length > 2) {
		//element.removeChild(rows[rows.length-1]);
		var toremove = rows[rows.length-1];
		toremove.parentNode.removeChild(toremove);
	}

	var element = document.getElementById('bestel_kleuren');
	var rows = element.getElementsByTagName('a');
	
	for(var i = 0; i < rows.length; i++)
        {
	    var limit = i+1;
	    if(limit == parseInt(rows.length)){
		
		if(parseInt(rows.length) != 1){

	            rows[i].style.display = 'block';

		}
		else {

		    rows[i].style.display = 'none';

		}

	    }
	    else {
	
	            rows[i].style.display = 'none';

	    }
        }
	
}

function toggle(id){

        var div = document.getElementById(id);
	if(div.style.display == "none"){

        	div.style.display = "block";
						
        }
        else {

		div.style.display = "none";

	}

}
function belmijSubmit(def_tekst, formulier){
			
	if (def_tekst == document.forms[formulier].telefoon.value){
				
		alert('Vul een geldig telefoonnummer in.');
				
	}
	
}

var ajax = new Array();

function getSizes(sel,id)
{
	var subID = sel.options[sel.selectedIndex].value;
	var ArtikelCode = document.getElementById('vArtikelCode').value;
	
	document.getElementById('sizes' + id).options.length = 0;	// Empty city select box
	if(subID.length>0){
		var index = ajax.length;
		var getSizes = '/getSizes.php?subID=' + subID + '&ArtikelCode=' + ArtikelCode;
		ajax[index] = new sack();
		
		ajax[index].requestFile = getSizes;	// Specifying which file to get
		ajax[index].onCompletion = function(){ generateSizes(index, id) };	// Specify function that will be executed after file has been found
		ajax[index].runAJAX();		// Execute AJAX function
	}
}

function generateSizes(index,id)
{
	var obj = document.getElementById('sizes' + id);
	eval(ajax[index].response);
}