function fnCheck(field,type){
	switch(type){
	case ('numeric'): return fnChecknumeric(field); break;
	case ('email'): return fnCheckemail(field); break;
	default: return fnCheckall(field);	
	}
}

function fnCheckall(i){
	var reg = /\w+/
	if (!reg.test(i.value)){ MM_showHideLayers('lyr'+i.form.name+i.name,'','show'); return false; }else{ MM_showHideLayers('lyr'+i.form.name+i.name,'','hide'); return true; }
}
function fnChecknumeric(i){
	invoer = i.value;
	var reg = /^\d+$/;
	if (!reg.test(invoer)){ MM_showHideLayers('lyr'+i.form.name+i.name,'','show'); return false; }else{ MM_showHideLayers('lyr'+i.form.name+i.name,'','hide'); }
}
function fnChecktel(i){
	invoer = i.value;
	while (invoer.indexOf('-') != -1){ invoer = invoer.replace('-',''); }
	while (invoer.indexOf(' ') != -1){ invoer = invoer.replace(' ',''); }
	var reg = /\d{10}/;
	if (!reg.test(invoer)){ MM_showHideLayers('lyr'+i.form.name+i.name,'','show'); return false; }else{ MM_showHideLayers('lyr'+i.form.name+i.name,'','hide'); }
}
function fnCheckzip(i){
	var reg = /\d{4}\s?\w+/;
	if (!reg.test(i.value)){ MM_showHideLayers('lyr'+i.form.name+i.name,'','show'); return false;}else{ MM_showHideLayers('lyr'+i.form.name+i.name,'','hide'); }
}
function fnCheckemail(i){
	//email ok until proven ontherwise, hide warning
	MM_showHideLayers('lyr'+i.form.name+i.name,'','hide');
	invoer = i.value;
	//controle op format
	var reg= /.[@].+[.]\w{2,}$/;
	if (!reg.test(invoer)){
		MM_showHideLayers('lyr'+i.form.name+i.name,'','show');
		return false; }
	//verwijder toegelaten speciale tekens uit mailadres	
	for (i=1;i<invoer.length;i++){ 
		var invoer = invoer.replace(/[@.-]/,"");
	}
	//controle op niet (alpha)numerieke tekens
	reg = /\W/;
	if (reg.test(invoer)){
		MM_showHideLayers('lyr'+i.form.name+i.name,'','show');
		return false; }
}
function fnCheckList(list,lyr){
	if (!list.type){ //radio buttons or checkboxes
		for (i=0;i<list.length;i++){
			if (list[i].checked && list[i].value != ''){
				MM_showHideLayers('lyr'+lyr,'','hide');return true;
			}
		}
		MM_showHideLayers('lyr'+lyr,'','show');return false;
	}else{
		for (i=0;i<list.length;i++){
			if (list.options[i].selected && list.options[i].value != ''){
				MM_showHideLayers('lyr'+list.form.name+list.name,'','hide');return true;
			}
		}
		MM_showHideLayers('lyr'+list.form.name+list.name,'','show');return false;
	}
}

function fnCheckListOLD(list,lyr){
	if (list.type == undefined){ //radio buttons or checkboxes
		for (i=0;i<list.length;i++){
			if (list[i].checked){
				MM_showHideLayers(lyr,'','hide');return true;
			}
		}
		MM_showHideLayers(lyr,'','show');return false;
	}else{
		for (i=0;i<list.length;i++){
			if (list.options[i].selected){
				MM_showHideLayers(lyr,'','hide');return true;
			}
		}
		MM_showHideLayers(lyr,'','show');return false;
	}
}
function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}