function write( message ) { document.write( "<li>" + message + ", " + ( typeof message ) + "</li>") } function convertBoolean( str ) { return str.toLowerCase() === "true"; } var trueStr = "true"; var falseStr = "false"; var trueUppercaseStr = "TRUE"; var falseUppercaseStr = "FALSE"; write( trueStr ); write( falseStr ); write( trueUppercaseStr ); write( falseUppercaseStr ); document.write( "<br/>" ) write( convertBoolean( trueStr ) ); write( convertBoolean( falseStr ) ); write( convertBoolean( trueUppercaseStr ) ); write( convertBoolean( falseUppercaseStr ) );