function upper(el) {
  el.value = el.value.toUpperCase()
}

function lower(el) {
  el.value = el.value.toLowerCase()
}	

function checksolvalues(){ //test invoer boeking form 1
	var msg='';
	var error=0;
	//var form = document.f
	// alert('CHECK')
  for(var x=0;x< document.f.elements.length;x++){
  	if ((document.f.elements[x].getAttribute("required") != null) && (document.f.elements[x].getAttribute("required")=='Y') && (document.f.elements[x].value.length == 0))	{
	  	msg += 'Veld ' + document.f.elements[x].name + ' is niet ingevuld!\n';
		  error++;
		  }
	  }
	  var gekozen = false;
    var butgrp = document.getElementsByName('geslacht');
    for (radio=0; radio < butgrp.length; radio++){
      if (butgrp[radio].checked){
      // alert(butgrp[radio].value);
       gekozen = true;
      }
    }
    if (!gekozen){
      error++;
      msg += 'Svp man/vrouw aangeven\n';
    }
    var RegExp = /\d{2}(\.|-|_)\d{2}(\.|-|_)\d{4}/
    if(document.f.gebdat.value.search(RegExp) == -1) {
      error++;
    	msg += 'Geb.datum klopt niet, gebruik [dd-mm-jjjj]\n';
    } else {
      if ((document.f.gebdat.value.substring(6,10) < 1900)||(document.f.gebdat.value.substring(6,10) > 2000 )||(document.f.gebdat.value.substring(0,2) > 31)||(document.f.gebdat.value.substring(3,5) > 12)||(document.f.gebdat.value.substring(0,2) == 00)||(document.f.gebdat.value.substring(3,5) == 00))	{
       error++;
       msg += 'Geb. datum is fout.\n';
      }
		}
	  var ok = true;
		var telchk  = new Array('1','2','3','4','5','6','7','8','9','0','/','.','-',' ','+','(',')')
    for (var i = 0; i < document.f.telefoon.value.length; i++) {
      var chr = document.f.telefoon.value.charAt(i);
      var found = false;
      for (var j = 0; j < telchk.length; j++) {
        if (chr == telchk[j]) {
				  found = true
			 	}
      }
      if ((!found) || (document.f.telefoon.value.length < 6)) {
	 	    ok = false
		  }
    }
    if (!ok) {
			error++;
			msg += 'Telefoonnummer is ongeldig\n';
		}
		var goodEmail = document.f.emailadres.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
    if(!goodEmail){
			error+=1;
			msg += 'E-mail adres is ongeldig\n'
		}
		if (error>0) {
			alert(msg);
			return false;
		}
	return true;	
}