[Zope] <dtml-var xxxx javascript_quote>

I find myself stuffing arbitrary strings into javascript pop-up displays, but those strings often contain characters (e.g. quotes) that break the genearated javascript syntax. I know there is no javascript_quote argument for dtml-var, and I probably have to filter the string with an external method. Does anyone have such an external method already in use that you could share with the list? -- Thanks -- Loren