var outputfields;

var zipcode;

function ziptosch(){
  try {    
    outputfields = getElementById("Schule");
    zipcode = getElementById("PLZ").value;
    // trim out spaces
    while (zipcode.indexOf(' ') != -1) {
      var i = zipcode.indexOf(' ');
      zipcode = zipcode.substring(0,i)+ zipcode.substring(i+1);
    }
    var b = zipcode.substring(0,2);
    var rootPath = ziptocityframe2.location.href.substring(0,ziptocityframe2.location.href.indexOf('ziptocity/'));
    var path = rootPath + 'test.php?zip=' + b;

    ziptocityframe2.location.href=path;    
  }catch(e) {}
}

function getElementById(id){
 var element=document.getElementById && document.getElementById(id) || document.all && document.all(id);
 return element;
}