function showtab(showId,maxId,control) {
var vis;
for (var x=0; x<=maxId; x++) {
if (showId==x) {
vis = "block";
label = "current";
} else {
vis = "none"
label = "";
}
document.getElementById("tab"+x).style.display = vis;
document.getElementById("label"+x).className = label;
if (control) {
control.blur()
}
}
}