set fonts and styles based on xml parent's attribute

Hi,

I am trying to write an Indesign javascript that can set the font and style based on the import XML parent's attribute,

<products>

<product>

    <language value="EN"><feature_1>1000w</feature><feature_2>10 max</feature_2></language>

    <language value="JP"><feature_1>500w</feature><feature_2>2 max</feature_2></language>

    <language value="TCN"><feature_1>750w</feature><feature_2>5 max</feature_2></language>

</product>

<product>

    <language value="EN"><feature_1>2000w</feature></language>

    <language value="TCN"><feature_1>2500w</feature><feature_2>2 max</feature_2><color>red</color></language>

</product>

</products>

each feature tag will be in its own tag frame.

all the sub-set under language value="EN" will have like Univers font, font size 100%, align to left  (which mean 1000w, 10 max, and 2000w will be this)

all the sub-set under language value="TCN" will have Sim Hei font, font size 100%, align to right

all the sub-set under language value="JP" will have MS Gothic font, font size 125%, align to left

I am new to indesign scripting, can someone point me to the right direction to get this started?

Thanks,