The “Attach a file†button in the window of your open Web-based mail message may make it seem like you have to navigate around your hard drive to find the file you want to send, but appearances might be deceiving.
In some Web browsers, both Yahoo Mail and Google's Gmail allow you to drag files from your computer's desktop right into the message window to upload them as file attachments. Yahoo has additional information on attachment management and Google has an illustrated example for Gmail.
