The practice of including units of measure comes from padding, margins and borders. Since there is a choice of px, em, %, etc, it makes sense to specify the units used. So it becomes good practice to include units in all places since it is possible to specify such measures on images and tables as well. It helps the browser to not have to guess at what you meant. And not guessing (guessing is quirks mode) is part of what css is all about.
Why you should do it is probably best stated in the discussion of length (which of course is both vertical and horizontal), found at: http://www.w3.org/TR/REC-CSS2/syndata.html#value-def-length And also, it does allow you to sometimes mix units. You can specify an image width of 100% and a pixel height since percentage heights are just disasters. I've seen units mixed usually on padding and margins. Although it tends to make most people cringe, it does seem to validate and work. Or do as Cheryl suggested and let the browser find the height. drew -----Original Message----- From: Jan Major Sent: Monday, November 24, 2003 8:37 PM To: [EMAIL PROTECTED] Subject: [wdvltalk] Re: css problem Drew No, I didn't know that we have to now put units of measure for images. My page validated without them, but I will definitely add the px to all image code. Do you know where I can find out that images require units of measures now. I know I can search through W3C, but am hoping that you have a particular page in mind. If not, I can find it. I found out what the p tag error was and fixed it. It doesn't want anything like this: <p style="text-align:justify">, so I made 3 classes for left, center, and right. Jan ____ * The WDVL Discussion List from WDVL.COM * ____ To Join wdvltalk, Send An Email To: mailto:[EMAIL PROTECTED] Send Your Posts To: [EMAIL PROTECTED] To set a personal password send an email to [EMAIL PROTECTED] with the words: "set WDVLTALK pw=yourpassword" in the body of the email. To change subscription settings to the wdvltalk digest version: http://wdvl.internet.com/WDVL/Forum/#sub ________________ http://www.wdvl.com _______________________ You are currently subscribed to wdvltalk as: [EMAIL PROTECTED] To unsubscribe send a blank email to %%email.unsub%% ____ • The WDVL Discussion List from WDVL.COM • ____ To Join wdvltalk, Send An Email To: mailto:[EMAIL PROTECTED] Send Your Posts To: [EMAIL PROTECTED] To set a personal password send an email to [EMAIL PROTECTED] with the words: "set WDVLTALK pw=yourpassword" in the body of the email. To change subscription settings to the wdvltalk digest version: http://wdvl.internet.com/WDVL/Forum/#sub ________________ http://www.wdvl.com _______________________ You are currently subscribed to wdvltalk as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED]
