fix throttle spec on oldIE
fix throttle spec on oldIE

ChristianGrete/mout,Oyamasiphula/mout,mout/mout,millermedeiros/mout,mout/mout,MathiasPaumgarten/mout,stevemao/mout,stevemao/mout,ChristianGrete/mout,MathiasPaumgarten/mout,Oyamasiphula/mout,millermedeiros/mout