function ImageswapSetup(){
  var x = document.getElementsByTagName("img");
  for (var i=0;i<x.length;i++){
    var oversrc = x[i].getAttribute("oversrc");
    if (!oversrc) continue;
    // preload image
    // comment the next two lines to disable image pre-loading
    x[i].oversrc_img = new Image();
    x[i].oversrc_img.src=oversrc;
    // set event handlers
    x[i].onmouseover = new Function("Imageswap(this,'oversrc');");
    x[i].onmouseout = new Function("Imageswap(this);");
    // save original src
    x[i].setAttribute("origsrc",x[i].src);
  }
}


function Imageswap(el,which){
        el.src=el.getAttribute(which||"origsrc");
}

function showPop(url, width, height) {
	LeftPosition=(screen.width)?(screen.width-width)/2:100;
	TopPosition=(screen.height)?(screen.height-height)/2:100;
	window.open(url,"popped","width="+width+",height="+height+",left="+LeftPosition+", top="+TopPosition+", scrollbars=yes,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=yes");
}

var PreImageswapOnload =(window.onload)? window.onload : function(){};
window.onload = function(){PreImageswapOnload; ImageswapSetup();}

function RegisterRubriekenShowSubrubrieken(id) {
  for (var i=1; i <= 40; i++) {
  	if (i != id) {
	  	elm = document.getElementById('registersubrubrieken'+i);
	  	if (elm)
		  	elm.style.display = 'none';
		  }
  }
	elm = document.getElementById('registersubrubrieken'+id);
	if (elm) {
		if (elm.style.display == 'block')
			elm.style.display = 'none'
		else
			elm.style.display = 'block';
	}
}

function RegisterZoekOpTekst(ZoekTekst) {
	if (ZoekTekst != '') {
		ZoekTekst = formatZoekTermen(ZoekTekst,2);
		if (ZoekTekst != '')
			window.location.href = 'index.php?page=vind product resultaat&zoektekst='+ZoekTekst;
	}
}

function formatZoekTermen(ZoekTermen, minLength) {
	var sBuf = Trim(ZoekTermen);
	if (sBuf != '') { 
		var aBuf = splitZoekTermen(sBuf);
		sBuf = '';
		for (i = 0; i < aBuf.length; i++) {
			if (aBuf[i].length < minLength) {
				alert('Een zoekwoord moet minimaal uit '+minLength+' letters bestaan.');
				return '';
			}
			else
				sBuf += aBuf[i] + ',';
		}
	}
	return sBuf;
}

function Trim(s) {
	return s.replace(/^\s+/g, '').replace(/\s+$/g, '');
}

function splitZoekTermen(s) {
	var sBuf='';
	var inQuotes=false;
	var j=0;
	var a=new Array();
	var c='';
	
	for (var i=0; i<s.length; i++) {
		c = s.substr(i,1);
		if (c == '"')
			inQuotes = !inQuotes;
		if (!inQuotes && c == ' ') {
			if (sBuf != '') {
				a[j] = sBuf;
				j++;
				sBuf = '';
			}
		}
		else
			sBuf += c;
	}
	if (sBuf != '')
		a[j] = sBuf;
	return a;
}