Difference between chr (13) and chr (10) - Stack Overflow Chr(10) is the Line Feed character and Chr(13) is the Carriage Return character You probably won't notice a difference if you use only one or the other, but you might find yourself in a situation where the output doesn't show properly with only one or the other So it's safer to include both
What does this regular expression mean ^[a-z]{1}[a-z0-9_]{3,13}$ 0 It matches a string starting with a-z followed by 3 to 13 characters from the character set a-z, 0-9 or _ There are a number of online tools that will explain elaborate the meaning of a regular expression as well as test them
How can I display an RTSP video stream in a web page? I have been exploring this possibility too with my multiple RTSP cameras, and don't want any ActiveX controls I'd like to build a custom web server which the web page continuously retrieves a JPEG image to display on the web page This way it can be supported in browsers such as Safari and viewed on an iPhone