Javascript checkbox not working on iPad

Hello,

    I have an awesome PDF Form that works perfectly on my PC. However many of the javascripts I'm using to make it so when you check a box another checks/unchecks are not working on iPad. Here are 2 samples. Anyone know how to get this working?

Example 1

if (event.target.value!="Off") this.getField("15moLoyalty").checkThisBox(0, true);

Example 2

if (event.target.value!="Off") this.getField("15moLoyalty").checkThisBox(0, false);