function create_div(obj,alert_txt){

obj.appendChild(document.createElement('DIV'));
obj.lastChild.style.color='red';
obj.lastChild.appendChild(document.createTextNode(alert_txt));

}

function setdata(){
var FF;

var obj=document.getElementById('error_div');
if(obj.lastChild)obj.removeChild(obj.lastChild);
obj.appendChild(document.createElement('DIV'));


FF=document.fo1.vonv.value;
if (FF !=""){
if(isNaN(FF)){
create_div(obj.lastChild,alert1);

document.fo1.vonv.select();
document.fo1.vonv.focus();
return false
}}
FF=document.fo1.bisv.value;
if(FF !=""){
if(isNaN(FF)){
create_div(obj.lastChild,alert1);
document.fo1.bisv.select()
document.fo1.bisv.focus()
return false}}
document.fo1.send.value=document.fo1.rg.value
return true
}

function chgindexout(i){
document.fo1.aha.value=""}
function changeon(objimg,o)
{objimg.src="../bilder/helpon.gif";
document.getElementById('span'+o).style.visibility="visible";}

function changeout(objimg,o)
{objimg.src="../bilder/helpout.gif";
document.getElementById('span'+o).style.visibility="hidden";}

function setvalue(i){
var n=0;	
document.fo1.send.value=i
document.fo1.aha.value=0;
while(n<10){document.fo1.rg.options[n].selected = false;n++;}
document.fo1.rg.options[i].selected=true;
if(setdata()){
document.fo1.action= 'sessionvars.php?lan='+lan+'&sf=3&defspr='+defspr;
document.fo1.submit()}}
function chgindex(i){
document.fo1.aha.value=i}

function Loeschen2(){
var n =1;
document.fo1.reset();
document.fo1.vonv.value = '';
document.fo1.bisv.value = '';
document.fo1.tl.options[0].selected = true;
while(n<10){document.fo1.rg.options[n].selected = false;n++;}
document.fo1.rg.options[0].selected = true;
n=1;
while(n<4){document.fo1.lg.options[n].selected = false;n++;}
document.fo1.lg.options[0].selected = true;
}
function setsearch(m){
if(m==2){document.fo1.action= 'sessionvars.php?lan='+lan+'&sf=3&defspr='+defspr;}
if(setdata()){document.fo1.submit()}}