Product attributes group combination

[senmaran]

I have some problem in product attributes selection.. One product have 2 attributes - like Purity, Weight

 

Purity - 14kt, 18kt

Weight - 3gms, 4gms, 10gms, 12gms

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14kt have only - 3gms, 4gms

18kt have only - 10gms, 12gms

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When i click on product detail and quick view page.. All the weight will appear. When i change the purity "This combination does not exist for this product. Please select another combination." Error will comes, but

 

i need display only related products attribute only.. for example default

14kt - 3gms, 4gms

 

When i change

18kt - 10gms, 12gms

 

After i change

14kt - 3gms, 4gms

 

Any one know this code changes, please help me.. site URL is: http://navaratnamaaligai.com/necklaces/9-necklace-02.html

 

thanks

maran