Javascript to detect Skype?
问题 Is it possible for some Javascript to detect whether Skype is installed or not? The reason I ask is that I'd like to change a link's href based on that: if Skype isn't installed, show a popup explaining what Skype is and how to install it, if it is installed, change the link to skype:my.contact.name?call so the click will start a call. Real estate issues means that I'd prefer to only have one link shown. 回答1: Thanks for the answers everyone: from the links and methods seanb and some posted, I