GUID generator in JavaScript

Found two little functions in JavaScript to create a GUID

function S4(){
return (((1+Math.random())*0x10000)|0).toString(16).substring(1);

function guid() {
return (S4()+S4()+"-"+S4()+"-"+S4()+"-"+S4()+"-"+S4()+S4()+S4());

Thanks to sj at, I don’t know exactly how reliable the generator is, I ran a couple tests against 50 guids, and it passed, but I need to run the guids through the Windows Installer using WiX, and I don’t know if there will be conflicts

I am still open to any other JavaScript generators if anyone knows of any

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