Search in UIwebview

Question

I want to implement Search(one by one) functionality in my UIwebview . I have following Javascript code.

strFound=self.find(str); if (!strFound) { strFound=self.find(str,0,1) while (self.find(str,0,1)) continue }

also I want to Scroll down UIwebview progmatically when a word is found on bottom. PL. guide me.