function top_menu(id) {

for (i=1;i<=4;i++) {
if (i != id) {
document.getElementById('top-sub-menu-'+i).style.visibility = 'hidden';
}
}

document.getElementById('top-sub-menu-'+id).style.visibility = 'visible';

}



function chart_pak_to_m2(n) {
original =  document.getElementById('productpak').value*n;
document.getElementById('productm2').value = Math.round(original*100)/100;
}

function chart_m2_to_pak(n) {

var m2 = document.getElementById('productm2').value;
var m2 = m2.replace(/,/g, ".");
var m2 = m2/n;



document.getElementById('productpak').value =  Math.ceil(m2);
}

function chart_lw_to_pak(n) {

l = document.getElementById('product_l').value;
w = document.getElementById('product_w').value; 

var l = l.replace(/,/g, ".");
var w = w.replace(/,/g, ".");


if (l != '' && w != '') {

m2 = l * w; 

if (document.getElementById('product_procent').checked) {
m2p = 10*(m2 / 100);
m2 = m2+m2p;
}

document.getElementById('productm2').value = Math.round(m2*100)/100;
document.getElementById('product_m2').value = Math.round(m2*100)/100;

chart_m2_to_pak(n);

}

}


function pop_stalen(n,img) {
day = new Date();
id = day.getTime();
URL = 'http://vloeren.stox.nl/stalenaanvraag.php';
eval("page" + id + " = window.open(URL+'?n='+n+'&img='+img, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=600,height=360');");
}


	var Ticker = new Class({
				setOptions: function(options) {
					this.options = Object.extend({
						speed: 1500,
						delay: 5000,
						direction: 'vertical',
						onComplete: Class.empty,
						onStart: Class.empty
					}, options || {});
				},
				initialize: function(el,options){
					this.setOptions(options);
					this.el = $(el);
					this.items = this.el.getElements('li');
					var w = 0;
					var h = 0;


					if(this.options.direction.toLowerCase()=='horizontal') {
						h = this.el.getSize().size.y;
						this.items.each(function(li,index) {
							w += li.getSize().size.x;
						});
					} else {
						w = this.el.getSize().size.x;
						this.items.each(function(li,index) {
							h += li.getSize().size.y;
						});
					}
					this.el.setStyles({
						position: 'absolute',
						top: 0,
						left: 0,
						width: w,
						height: h
					});
					this.fx = new Fx.Styles(this.el,{duration:this.options.speed,onComplete:function() {
						var i = (this.current==0)?this.items.length:this.current;
						this.items[i-1].injectInside(this.el);
						this.el.setStyles({
							left:0,
							top:0
						});
					}.bind(this)});
					this.current = 0;
					this.next();
				},
				next: function() {
					this.current++;
					if (this.current >= this.items.length) this.current = 0;
					var pos = this.items[this.current];
					this.fx.start({
						top: -pos.offsetTop,
						left: -pos.offsetLeft
					});
					this.next.bind(this).delay(this.options.delay+this.options.speed);
				}
			});






window.addEvent('domready',function(){
 
Element.extend(     //Implement the following functions in every element existent in the webpage
         {
             show:function(e){
           
             this.setStyle('display','block');
           
             },
             hide:function(e){  
             this.setStyle('display','none');
           
             }
         }
         );
 
});