function number_format( number, decimals, dec_point, thousands_sep ) {
	var n = number, prec = decimals;
	n = !isFinite(+n) ? 0 : +n;
	prec = !isFinite(+prec) ? 0 : Math.abs(prec);
	var sep = (typeof thousands_sep == "undefined") ? ',' : thousands_sep;
	var dec = (typeof dec_point == "undefined") ? '.' : dec_point;
	var s = (prec > 0) ? n.toFixed(prec) : Math.round(n).toFixed(prec); //fix for IE parseFloat(0.55).toFixed(0) = 0;
	var abs = Math.abs(n).toFixed(prec);
	var _, i;
	if (abs >= 1000) {
		_ = abs.split(/\D/);
		i = _[0].length % 3 || 3;
		_[0] = s.slice(0,i + (n < 0)) +
		_[0].slice(i).replace(/(\d{3})/g, sep+'$1');
		s = _.join(dec);
	} else {
		s = s.replace('.', dec);
	}
	return s;
}

// Flash Chilli Animated Tooltips
var tooltip = function(){
	var id = 'tt';
	var top = 10;
	var left = 15;
	var maxw = 300;
	var speed = 10;
	var timer = 10;
	var endalpha = 100;
	var alpha = 0;
	var tt,t,c,b,h;
	var ie = document.all ? true : false;
	return{
		show:function(v,w){
			if(tt == null){
				tt = document.createElement('div');
				tt.setAttribute('id',id);
				document.body.appendChild(tt);
				tt.style.opacity = 0;
				tt.style.filter = 'alpha(opacity=0)';
				document.onmousemove = this.pos;
			}
			tt.style.display = 'block';
			tt.innerHTML = v;
			tt.style.width = w ? w + 'px' : 'auto';
			if(!w && ie){
				tt.style.width = tt.offsetWidth;
			}
			if(tt.offsetWidth > maxw){tt.style.width = maxw + 'px'}
			h = parseInt(tt.offsetHeight) + top;
			clearInterval(tt.timer);
			tt.timer = setInterval(function(){tooltip.fade(1)},timer);
		},
		pos:function(e){
			var u = ie ? event.clientY + document.documentElement.scrollTop : e.pageY;
			var l = ie ? event.clientX + document.documentElement.scrollLeft : e.pageX;
			tt.style.top = (u + top) + 'px';
			tt.style.left = (l + left) + 'px';
		},
		fade:function(d){
			var a = alpha;
			if((a != endalpha && d == 1) || (a != 0 && d == -1)){
				var i = speed;
				if(endalpha - a < speed && d == 1){
					i = endalpha - a;
				}else if(alpha < speed && d == -1){
					i = a;
				}
				alpha = a + (i * d);
				tt.style.opacity = alpha * .01;
				tt.style.filter = 'alpha(opacity=' + alpha + ')';
			}else{
				clearInterval(tt.timer);
				if(d == -1){tt.style.display = 'none'}
			}
		},
		hide:function(){
			clearInterval(tt.timer);
			tt.timer = setInterval(function(){tooltip.fade(-1)},timer);
		}
	};
}();

function textField(id) {
	if (document.getElementById('vraag_' + id + '_ja').checked == true) {
		document.getElementById('field_' + id).style.display = 'block';
	} else {
		document.getElementById('field_' + id).style.display = 'none';
	}
}



function hideDiv() { 
	if (document.getElementById) { // DOM3 = IE5, NS6 
		document.getElementById('hideshow').style.visibility = 'hidden'; 
	} else { 
		if (document.layers) { // Netscape 4 
		document.hideshow.visibility = 'hidden'; 
		} else { // IE 4 
			document.all.hideshow.style.visibility = 'hidden'; 
		} 
	} 
}

function showDiv() { 
	if (document.getElementById) { // DOM3 = IE5, NS6 
		document.getElementById('hideshow').style.visibility = 'visible'; 
	} else { 
		if (document.layers) { // Netscape 4 
			document.hideshow.visibility = 'visible'; 
		} else { // IE 4 
			document.all.hideshow.style.visibility = 'visible'; 
		} 
	} 
} 

function copyNumber() {
	var x = document.getElementById("telefoon").value;
	document.getElementById("telefoon_callback").value = x;
}
function copyName() {
	var x = document.getElementById("naam").value;
	document.getElementById("naam_callback").value = x;
}