Hi Ewen
You may want to look at this
var oDataButtons = [{
text:"{ON/OFF}",
text:"{√}",
text:"{%}",
text:"{/}"
}, {
text:"{7}",
text:"{8}",
text:"{9}",
text:"{*}"
}, {
text:"{4}",
text:"{5}",
text:"{6}",
text:"{-}"
}, {
text:"{1}",
text:"{2}",
text:"{3}",
text:"{+}"
}, {
text:"{0}",
text:"{.}",
text:"{=}"
}];
You cannot have object of the same key. you have 4 identical keys in an object.