Once IE7 takes over from IE6 I will be using PNGs alot more. I use A lot of graphics with transparency so IE6 was a huge factor in me not being able to use PNG.
all programming languages have some functionality to interact with the APIs the hardware provides but I don't think there is a language just for routers, etc
this part (select stock from Stockss Where stock=0) potentially can have more than 1 record so the you cannot compare it to asingle value.You are better off tryign to handle this in your server side code. You can loop through the returned records in SQL but it is messy and confusing.Just return the query and process the records with PHP or something.
RADEditor is awesome. We use it at work (we bought the whole Telerik suite). It is the best editor I have ever seen, and it fully integrates into ASP.Net and VS, only problem is the cost, it kind of expensive.
CCNA is focused on Cisco routers and products while Microsoft looks at things with less emphasis on the brand of product but both are very good.Obviously Microsofts courses will focus on windows networking, I did not get far enough into CCNA to know which OSs they focus on.