gistfile1.js

var myString = "true";

if(Boolean(myString)) {
    // very good, this if statement evaluates to true correctly!
}

if(!Boolean(myString)) {
    // and this one evaluates to false! Our problems are solved!
}

var myOtherString = "false";

if(Boolean(myOtherString)) {
    // ...or are they? This evaluates to true, although we clearly set it to "false"!
}