JavaScript : Prevent showing alert when the url being opened is invalid

I have a requirement where I have to open a URL from html page. But, before I open the URL I cannot determine if the URL is a valid or not, so when I try to open a invalid url, the webpage throws an alert saying "Safari cannot open the page because the address is invalid.".

I understand it is designed for a reason, but is there anyway to prevent showing this alert, when the url is not a valid one.