why break this up javascript fragment? [duplicate]

This question already has answers here: Closed 12 years ago.

Possible Duplicate:

Why split the <script> tag when writing it with document.write()?

I don't really do Javascript programming and was hard to google this but have seen something like this in a couple of different places 开发者_JAVA百科(by good developers):

document.writeln('<scr'+'ipt src="'+pcheck+'" type="text/javascript"></scr'+'ipt>');

With the split always between the r and the i. What does this achieve?

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This is to prevent any script blockers from loading this script, because they cannot find the "script" word within the text.