trac #3308: Gene page plots don't show up on Firefox 3.6 and IE8
trac #3308: Gene page plots don't show up on Firefox 3.6 and IE8

In firefox 3x and IE undeclared variables could not be checked for undefined with "if (varName) {...}" code, you have to do this in classic way: "if (typeof varName !== 'undefined') {...}"  or use parent object: "if (parent.varName){...}"

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