//Standard-Fehlermeldung
strMsg='Fehler';




function Check_EMail(s)
{
 var a = false;
 var res = false;
 if(typeof(RegExp) == 'function')
 {
  var b = new RegExp('abc');
  if(b.test('abc') == true){a = true;}
  }

 if(a == true)
 {
  reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+
                   '(\\@)([a-zA-Z0-9\\-\\.]+)'+
                   '(\\.)([a-zA-Z]{2,4})$');
  res = (reg.test(s));
 }
 else
 {
  res = (s.search('@') >= 1 &&
         s.lastIndexOf('.') > s.search('@') &&
         s.lastIndexOf('.') >= s.length-5)
 }
 return(res);
}

/** Überflüssige Leerzeichen entfernen */

function trim(strIn)
{

return(strIn.replace(/(^\s+|\s+$)/g,''));

}


/** text-input und textarea prüfen */

function text_check(objElem, arrCheck)
{

objElem.value=trim(objElem.value);

if (arrCheck[0] || objElem.value.length > 0)
    {
    if (!objElem.value.match(arrCheck[1]))
        {
        alert((arrCheck.length == 3) ? arrCheck[2] : strMsg );
        objElem.select();
        objElem.focus();
        return false;
        }
    }
return true;

}


/** boxes checken */

function box_check(objElem, arrCheck)
{

intChecked = 0;
arrBoxes=(typeof objElem.form.elements[objElem.name].length == 'number')
            ?objElem.form.elements[objElem.name]
            :new Array(objElem);

for (e = 0; e < arrBoxes.length; ++e)
    {
    intChecked+=(arrBoxes[e].checked) ? 1 : 0
    }

if (!eval('intChecked' + arrCheck[1]))
       {
       alert((arrCheck.length == 3) ? arrCheck[2] : strMsg);
       arrBoxes[0].focus();
       return false;
       }
return true;

}


/** Listen checken */

function list_check(objElem, arrCheck)
{
if(!eval('objElem.selectedIndex' + arrCheck[1]))
    {
    alert((arrCheck.length == 3) ? arrCheck[2] : strMsg );
    objElem.focus();
    return false;
    }
return true;
}


/** befindet sich objElem in objForm? */

function in_form(objElem,objForm)
{

return(typeof objElem.form=='object' && objElem.form==objForm);

}

/** zu prüfende Formularelemente ermitteln */



function get_field_type(objElem)
{

switch (objElem.tagName.toLowerCase())
    {
    case "input":
        switch(objElem.type)
            {
            case "text":
                strFieldType='text';
                break;

            case "password":
                strFieldType='text';
                break;

            case "file":
                strFieldType='text';
                break;

            case "radio":
                strFieldType='box';
                break;

            case "checkbox":
                strFieldType='box';
                break;

            default:
                strFieldType=false;
                break;
            }
        break;

    case "select":
            strFieldType='list';
            break;

    case "textarea":
            strFieldType='text';
            break;

    default:
            strFieldType=false;
            break;
    }
return strFieldType;

}