/* This script and many more are available free online at

The JavaScript Source :: http://javascript.internet.com

Created by: Amit Wadhwa :: http://amitwadhwa.fcpages.com/javascript.com/formvalidator.html */



function checkThisForm(formname, submitbutton, errors) {

  if (errors == '') {

    eval(formname+'.'+submitbutton+'.disabled=true');

    eval('document.'+formname+'.submit()');

  } else {

    alert(errors);

  }

}



function checkText(formname, textboxname, displaytext) {

  var localerror = '';

  if(Trim(eval('document.'+formname+'.'+textboxname+'.value'))=='') {

    localerror =  '- '+displaytext+' is een verplicht veld.\n';

  } else localerror = '';

  return localerror;

}



function checkNum(formname, textboxname, displaytext) {

  var localerror = '';

  if(isNaN(eval('document.'+formname+'.'+textboxname+'.value'))) {

    localerror =  '- '+displaytext+' moet een nummer zijn.\n';

  } else localerror = '';

  return localerror;

}



function checkSpaces(formname, textboxname, displaytext) {

  var valid = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_'; // define valid characters

  var localerror = '';

  if(!isValid(Trim(eval('document.'+formname+'.'+textboxname+'.value')), valid)) {

    localerror =  '- '+displaytext+' mag geen spaties bevatten.\n';

  } else localerror = '';

  return localerror;

}



function checkSelect(formname, selectboxname, displaytext) {

  var localerror = '';

  if(eval('document.'+formname+'.'+selectboxname+'.selectedIndex')==0) {

    localerror =  '- '+displaytext+' is een verplicht veld.\n';

  } else localerror = '';

  return localerror;

}



function getRadio(formname, radioname, displaytext) {

  for (var i=0; i < eval('document.'+formname+'.'+radioname+'.length'); i++) {

    if (eval('document.'+formname+'.'+radioname+'[i].checked')) {

      var rad_val = eval('document.'+formname+'.'+radioname+'[i].value');

      return rad_val;

    }

  }

}



function checkRadio(formname, radioname, displaytext) {

  var localerror = '';

  var rad_val    = '';

  for (var i=0; i < eval('document.'+formname+'.'+radioname+'.length'); i++) { //check every radio button by that name

    if (eval('document.'+formname+'.'+radioname+'[i].checked'))  { //if it is checked

      rad_val += '-';

      }	else rad_val += '';

      }

    if (rad_val=='') {

      localerror =  '- '+displaytext+' is een verplicht veld.\n';

    }

  return localerror;

}



function autoComplete (field, select, property) {

/*onKeyUp="autoComplete(this,this.form.selectboxname,'value',false)" - add this to textbox where you are typing*/

  var found = false;

  for (var i = 0; i < select.options.length; i++) {

    if (select.options[i][property].toUpperCase().indexOf(field.value.toUpperCase()) == 0) {

      found=true; break;

    }

  }

  if (found) {

    select.selectedIndex = i;

  } else {

    select.selectedIndex = -1;

  }

  if (field.createTextRange) {

    if (!found) {

      field.value=field.value.substring(0,field.value.length-1);

      return;

    }

    var cursorKeys ="8;46;37;38;39;40;33;34;35;36;45;";

    if (cursorKeys.indexOf(event.keyCode+";") == -1) {

      var r1 = field.createTextRange();

      var oldValue = r1.text;

      var newValue = found ? select.options[i][property] : oldValue;

      if (newValue != field.value) {

        field.value = newValue;

        var rNew = field.createTextRange();

        rNew.moveStart('character', oldValue.length) ;

        rNew.select();

      }

    }

  }

}



function Trim(s) {

  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r')) {

    s = s.substring(1,s.length);

  }

  while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r')) {

    s = s.substring(0,s.length-1);

  }

  return s;

}



function isValid(string,allowed) {

//  var valid = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; // define valid characters

    for (var i=0; i< string.length; i++) {

      if (allowed.indexOf(string.charAt(i)) == -1) return false;

    }

    return true;

}