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/** | |
* Progressive Enahncement to use SVG sprites with PNG fallback for IE6+7 | |
* | |
* The trick: | |
* Legacy IE does not support rgba values. | |
* By defining a rgba background color together with the | |
* SVG background image for all modern browsers, legacy IE | |
* will ignore the SVG and use the | |
* first background definition containing the fallback PNG | |
* |