What is the ruling on using western styled toilets?

Question 9: Is it permissible to use western style toilets?

Answer: All Praise is due to Allaah Alone and peace and blessings be upon His Messenger, his family, and Companions. To commence: It is permissible to use any toilets but try to protect your bodies and clothes from Najaasah (ritual impurity) when relieving yourselves. After finishing, you should follow the Islaamic way either by performing Istijmaar (cleansing the private parts with hard material after urination or defecation) or Istinjaa’ (cleansing the private parts with water after urination or defecation) and… read more here.