How is it possible without eval() ? [DE/EN]

how is following code possible without using eval() ?
• html ------<select id="ImageExportCameraSelect" name="ImageExportCameraSelect">
<option value="EditorRenderer">Editor</option>
<option value="ViewRenderer">Viewer</option>
<option value="IsoViewRenderer">IsoView</option>
</select>
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• javascript -var RendererValue=ImageExportCameraSelect.value;
eval('var Renderer='+RendererValue+';');
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The option values are names of the variable which I use to render...