evalAttributeOnce clears attribute in a way that works both on ie and firefox
evalAttributeOnce clears attribute in a way that works both on ie and firefox

ajturner/crisiscommons,geoiq/digitalgazette,adammck/crabgrass,ajturner/crisiscommons,riseuplabs/crabgrass,adammck/crabgrass,riseuplabs/crabgrass,nilclass/echosocial,riseuplabs/crabgrass,geoiq/digitalgazette,riseuplabs/crabgrass,nilclass/echosocial,riseuplabs/crabgrass,nilclass/echosocial,adammck/crabgrass,geoiq/digitalgazette,adammck/crabgrass,geoiq/digitalgazette,riseuplabs/crabgrass,nilclass/echosocial,ajturner/crisiscommons,riseuplabs/crabgrass,ajturner/crisiscommons