Can I pass JS objects to Object Script API methods?

Hi - I see in the documentation that Object Script API methods expect JS arrays where they expect field values. The arrays are to include name/value pairs, one per field. One example is: var x = new Array(); x["amount"]=1000; x["R477842"]={!id}; x["name"]="API Created"; var newId = rbv_api.createRecord("item", x); Is it acceptable to pass a JS object instead of a JS array? For example, I would like to do this for the above: var newId = rbv_api.createRecord("item", {amount:1000,R477842:{!id},name:"API Created"});