IE8 and below doesn't do split() properly, so implement it by hand for those browsers.  Fixes a problem with localization substitution in IE8 and below.
IE8 and below doesn't do split() properly, so implement it by hand for those browsers.  Fixes a problem with localization substitution in IE8 and below.

anueshenxing/MathJax,nvp2211/MathJax,wikimedia/MathJax,cben/MathJax,wikimedia/mathoid,GerHobbelt/MathJax,wikimedia/mathoid,wikimedia/mathoid,thomasjm/MathJax,wikimedia/mathoid,kwangkim/mathoid,thomasjm/MathJax,ManrajGrover/MathJax,louisd67/formules-science,MonashAlexandria/mathoid,physikerwelt/mathoid-server,Edraak/MathJax,minrk/components-mathjax,minrk/mathjax-component,cheerfulstoic/MathJax,physikerwelt/mathoid-server,thomasjm/MathJax,GerHobbelt/MathJax,Edraak/MathJax,jeremykenedy/MathJax,anueshenxing/MathJax,mcanthony/MathJax,Ivanwangcy/MathJax,physikerwelt/MathJax,Galadirith/MathJax,perseoq/MathJax,jeremykenedy/MathJax,dpvc/MathJax,physikerwelt/mathoid-server,thomasjm/MathJax,kwangkim/mathoid,anusornc/MathJax,MonashAlexandria/mathoid,kwangkim/mathoid,thomasjm/MathJax,mcanthony/MathJax,kwangkim/mathoid,jinntrance/mathjax,Ivanwangcy/MathJax,CengageEng/MathJax,segmentio/MathJax,minrk/components-mathjax,anusornc/MathJax,perseoq/MathJax,minrk/mathjax-component,cheerfulstoic/MathJax,rachetfoot/MathJax,nvp2211/MathJax,cben/MathJax,ManrajGrover/MathJax,jinntrance/mathjax