Question

<script>
var tids = {
308: 1,
312: 1,
313: 1,
314: 1
};
</script>

results in “missing } in XML expression with an arrow pointing to the first colon in the JS error console. Isn’t this a valid declaration?

Answer 1

First you should fix your <script> tag to

<script type="text/javascript">

Next, if you want to use numeric indexes, try to declare them as a string:

var tids = {
'308': 1,
'312': 1,
'313': 1,
'314': 1
};

Please note, however, that you will not be able to reference them in object notation (i.e. tids.308). You could simply use arrays instead of objects: