{
if((event.keyCode >= 48 )&&(event.keyCode<=57))
{
return true;
}else
{
event.preventDefault();
return false
}
}
<input type="text" ng-model="templateSet.set2" ng-keydown="limitNumber($event)" style="width:50px">
}
<input type="text" ng-model="templateSet.set2" ng-keydown="limitNumber($event)" style="width:50px">