function jah_switch(url,target, input)
{

    if (document.getElementById(target).innerHTML != '') {
        document.getElementById(target).innerHTML = input;
    } else {
        jah(url,target);
    }

}

function jah(url,target, input) {
    // native XMLHttpRequest object
    document.getElementById(target).innerHTML = '<span class="ajah_waiting">Gegevens verwerken...</span>';
    var tekst = document.getElementById('tekst').value;
	//var height = document.getElementById('height').value;
	var cost = document.getElementById('height').value;

    for (i = 0; i < tekst.length; i ++)
    {
        tekst = tekst.replace('\n', '<br />');
    }
	
	var font = document.getElementById('font').value;
	var weight = document.getElementById('bold').checked;
	var style = document.getElementById('italic').checked;
	var color = document.getElementById('color').value;
	var align = document.getElementById('align').value;
	var flip = document.getElementById('flip').checked;
	
	var price = 4 + (tekst.length * cost);
	price = Math.round(price*100)/100;

	var info = "Aantal letters:" +tekst.length+ "<br /> Prijs: &euro; "+price+"<input type=hidden name=price value="+price+" /> <input type=hidden name=length value="+tekst.length+" />  ";
	
	//alert(input);
	if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = function() {jahDone(target, info);};
        req.open("POST", url+'?tekst='+tekst+'&font='+font+'&weight='+weight+'&style='+style+'&color='+color+'&align='+align+'&flip='+flip, true);
		req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
        req.send();
    // IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = function() {jahDone(target, info);};
            req.open("POST", url+'?tekst='+tekst+'&font='+font+'&weight='+weight+'&style='+style+'&color='+color+'&align='+align, true);
			req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
            req.send(null);
        }
    }
}    

function jahDone(target, info) {
    // only if req is "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            results = req.responseText;
            document.getElementById(target).innerHTML = results;
			
			document.getElementById("info").innerHTML = info;
        } else {
            document.getElementById(target).innerHTML="jah error:\n" +
                req.statusText;
        }
    }
}