How to set default page in umbraco?

Setting default page is a tricky process, as umbraco always defaults to the first page in document structure. Sometimes, the first page in your document structure may not be the default document you. In such case you can use the below approach.

 

In the template of the first document (or create new document type for tis and use this for creating a root document), add java script redirection as below .In my case it will redirect to index.html.