remove 'invisable' white spaces

sometimes, by editing, and in some editors, invisable white spaces are added
to the xml doc.

because i'm putting xml-content into a javascript-variable, no such white
spaces are allowed, with the reason that it creates line breaks in that
generated value and result in a js-error then

like this:
label1 = new Label('<table border="0"><tr><td width="280"><div 
align="justify">bla bla bla bla</div>')

must be
label1 = new Label('<table border="0"><tr><td width="280"><div
align="justify">bla bla bla bla</div>')

Exist there a way to remove such not-allowed (in this case) white spaces ?

thx
kristof

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