box shadow on an ipad / safari

I'm having trouble adding the nice shadow on focus for an input box on my ipad for safari.

Here's my code

/* remember to define focus styles! */
:focus {
    outline: 0;
}    
input[type=text]{
        width: 494px;

        height: 44px;
        line-height: 44px;
        font-size: 24px;
        border: 2px solid #666666;
    }
    input:focus{
      -webkit-box-shadow:0 0 15px #ffffff;
       -moz-box-shadow: 0 0 15px #ffffff;
       box-shadow:0 0 15px #ffffff;
    }

I'm using eric meyer's reset. I want it to look like this:

Any ideas?

Thanks guys.

Jason