URL Regular Expression

Here is a good Regular Expression for evaluating a URL

(http(s)?\:\/\/)?([\w_-]{2,}\.)+([\w_-]{2,})((\/)(\~)[\w_-]+)?((\/)[\w_-]+)*((\/)¦(\/)[\w_-]+\.[\w]{2,})?((\?[\w_-]+\=([^\#]+)){0,1}(\&[\w_-]+\=([^\#]+))*)?(#[\w_-]+)?