Its called a drive by infection, by visiting a compromised or malicious website using javascript to infect your PC.

I use Chrome browser with javascript disabled, or use Firefox with no script add on.

Java and Javascript are two completely different things, from different companies.

You can set IE7 or 8 to prompt you when javascript wants to load, then you can decide if you want to let it run or not, some features in webpages will not work if javascript is not allowed to run.

To cause IE7 or 8 to prompt, go to Internet Options>Security Tab>Click the "Internet" icon, then click the "custom level" button, when a window opens scroll down to "Scripting" section, under "Active Scripting" set it to "Prompt", hit Ok, then Ok again.

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