var W3CDOM = (document.createElement && document.getElementsByTagName);

window.onload = function ()
{
	if (!W3CDOM) return;
	if (document.getElementById('zoekterm'))
	{
		document.getElementById('zoekterm').onsubmit = zoek;
	}
	if (document.getElementById('WOZ') && document.getElementById('WOZwaarde') && document.getElementById('Hypotheek'))
	{
		document.getElementById('melding').className = 'hidden';
		document.getElementById('geenWOZ').className = 'hidden';
		document.getElementById('WOZwaarde').onchange = woz_onchange;
		document.getElementById('Hypotheek').onchange = woz_onchange;
	}
}

function zoek()
{
	var zt = this.zoeken;
	if (zt.value.length >=2) {
		content.location='zoeken.asp?zoeken='+zt.value;
		zt.value='';
		return false;
	} else {
		alert('U heeft geen zoekterm ingevoerd. Probeer het nogmaals.');
		zt.focus();
		return false;
	}
}


function woz_onchange()
{
	var res = "http://www.interbank.nl/consument/calcwoz.asp?WOZwaarde=" + 
			myParseFloat(replace(document.getElementById('WOZwaarde').value,',','.')) + 
			"&Hypotheek=" + 
			myParseFloat(replace(document.getElementById('Hypotheek').value,',','.'));
	var node = document.createElement('SCRIPT');
	node.src = res;
}

function replace(string,text,by) {
    var strLength = string.length, txtLength = text.length;
    if ((strLength == 0) || (txtLength == 0)) return string;

    var i = string.indexOf(text);
    if ((!i) && (text != string.substring(0,txtLength))) return string;
    if (i == -1) return string;

    var newstr = string.substring(0,i) + by;

    if (i+txtLength < strLength)
        newstr += replace(string.substring(i+txtLength,strLength),text,by);

    return newstr;
}

function myParseFloat(value)
{
	if (value == "")
		return 0.0;
	else
		return(parseFloat(value));
}