Javascript实现转页的功能

Question

1. function returnFactPage(newIndex)
2. {
3. var pageCount = document.getElementById("FactNameControl_divPageCount").innerHTML;
4. var newPage = "factindex="+newIndex;
5. var pattern = /factIndex="d*/img;
6. var url = window.***.toString();
7. var newurl = "";
9. if(url.toLowerCase().indexOf("factindex=") == -1)
10. {
11.   if(url.toLowerCase().indexOf("?") == -1)
12.    newurl = url + "?" + newPage;
13.   else
14.    newurl = url + "&" + newPage;
15. }
16. else
17.   newurl = url.toLowerCase().replace(pattern,newPage);
18. window.navigate(newurl);
19. return false;
20. }

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