Hallo!
alert() ist Dein Freund!
Hier der richtige Code:
function verstecke(Pos) {
for (var x = 0; x <= 8; x++) {
var DIV_name = "form_" + x
var DIV_Style = document.getElementById(DIV_name).style.display
if ( Pos == x ) {
document.getElementById(DIV_name).style.display = "block"
}
else {
if ( DIV_Style != "none" ) {
document.getElementById(DIV_name).style.display = "none"
}
}
}
}