Isaac Lubow questions

• How to check for the presence of an element?
• What's a better method for triggering a load() event on cached images?
• How large does a file need to be to benefit from gzip compression?
• Is there a way to hide text if a font is unavailable?
• How to use JS to trigger a GIF animation?
• Can I refer to a variable using a string?
• Is there a way to group CSS selectors for clarity?
• Is jQuery's "each()" method a for loop?
• Why would the background-image property cause a warning in Chrome?
• Is the <noscript> tag outmoded?

Isaac Lubow answers