function getAdr(prefix, postfix, text) {
        document.write('<a href="mailto:' + prefix + '@' + postfix + '">' + (text ? text.replace(/&quot;/g, '"').replace(/%EMAIL%/, prefix + '@' + postfix) : prefix + '@' + postfix) + '</a>');
}

// deletes leading and trailing spaces in a string - adds the function directly to the String Object, so that all strings inherit this method
String.prototype.trim = function() {
    return this.replace(/(^\s*)|(\s*$)/g, '');
}

//checkEmail - needed for forms
function checkEmail(val) {
  if (val) {
    var usr = "([a-zA-Z0-9][a-zA-Z0-9_.-]*|\"([^\\\\\x80-\xff\015\012\"]|\\\\[^\x80-\xff])+\")";
    var domain = "([a-zA-Z0-9][a-zA-Z0-9._-]*\\.)*[a-zA-Z0-9][a-zA-Z0-9._-]*\\.[a-zA-Z]{2,5}";
    var regex = "^"+usr+"\@"+domain+"$";
    var myrxp = new RegExp(regex);
    var check = (myrxp.test(val));
    if (check!=true) {
      return false;
    }
    else {
      return true;
    }
  }
}

function colorforms(element) {
        element.style.border="1px solid #991b02";
	if (!element.onblur){
		element.onblur = function (event) { element.style.border="1px solid #000000"; }
        }
}

/*
validates formfields if they have a value or not
to check for other options do the following
specialfields = new Object();
specialfields.fieldname = new Object();
specialfields.fieldname.check1 = 'function_to_call,error_message';
specialfields.fieldname.check2 = 'second_function_to_call,second_error_message';
specialfields.another_fieldname = new Object();
specialfields.another_fieldname.check1 = 'function_to_call,error_message';
*/
function validateForm(form,specialfields) {
  var errors = new Array();
  var fields = form.getElementsByTagName('label');
  for (i = 0; i < fields.length; i++) {
    var span = fields[i].getElementsByTagName('span')[0];
    if (span && span.firstChild) {
      var label = span.firstChild.data;
      label = label.trim();
      // if there is a '*' in the label - this indicates the inputfield has to be filled
      if (label.charAt(label.length - 1) == '*') {
        label = label.substring(0, label.length - 1).trim();
        // get the inputfield
        var obj_input = fields[i].getElementsByTagName('input');
        if (!obj_input[0])
          obj_input = fields[i].getElementsByTagName('select');
        if (!obj_input[0])
          obj_input = fields[i].getElementsByTagName('textarea');

        // if there is an inputfield
        if (obj_input && obj_input[0]) {
          input = obj_input[0];
          error = false;
          
          // check if the inputfield has a value
          if (!input.value || input.value.trim().length==0) {
            error = true;
            errors.push(label + ' nicht eingegeben');
          }
          
          // check the inputfield for special things (email, ...)
          if (!error && specialfields[input.name]){
            specialfield = specialfields[input.name];
            for (check in specialfield){
              check_function = specialfield[check].split(',')[0];
              check_message = specialfield[check].split(',')[1];
              if (!eval(check_function)(input.value)){
                error = true;
                errors.push(label + ' ' + check_message);
              }
            }
          }

          // on error give the label the className 'error' otherwise delete the className 'error' (if exists)
          if (error) {
            className = fields[i].className;
            if (className.length>0){
              className = className + ' ';
            }
            fields[i].className = className + 'error';
          } else {
                    className = fields[i].className;
            if (className.indexOf('error')>-1){
                className = className.replace(' error', '');
                className = className.replace('error', '');
                fields[i].className = className;
            }
          }
        }
      }
    }
  }

  return errors;
}

function showFormErrors (errors) {
  error_message = '';
  for (i=0;i<errors.length;i++){
    error_message += errors[i] + '\n';
  }
  alert(error_message);
}


function popup(url, typ, para1, width, height) {
  attrib = "";
  Y = (screen.height - width) / 2;
  X = (screen.width - height) / 2;
  X = Math.round(X);
  Y = Math.round(Y);
  if (para1 == 'CENTER') attrib += 'height=' + height + ',width=' + width + ',top=' + Y + ',left=' + X;
  if (typ == 'TYP1') attrib += ",scrollbars=no";
  if (typ == 'TYP2') attrib += ",scrollbars=yes";
  if (typ == 'TYP3') attrib += ",scrollbars=yes,menubar=yes";
  fenster = window.open(url, 'win', attrib);
  return false;
}