function presets () {
}var feld11=0;
var feld12=0;
function Go() {
error = "";
anz = "";
if (document.formular.feld11.value == "" && feld11 != 'none') { error += "\n- Name"; anz++; }
if (document.formular.feld12.value == "" && feld12 != 'none') { error += "\n- Email"; anz++; }
if (anz == 1) { alert("Please complete this field: " + error + "\n"); return (false); }
if (anz > 1) { alert("Please complete these fields: " + error + "\n"); return (false); } 
error = "";
anz = "";
if (anz >= 1) { alert(error + "\n"); return (false); }
return (true); 
}