Monaca's iPhone Debugger Can't Handle

Good evening, I can't handle the time with monaca's iPhone debugger.
Currently

<input type="date"> and <input type="time">

You are trying to get the value of to be calculated.
I think it would be good to put the obtained value in the date and have it calculated, but the time part (time part, 00:00)
cannot be handled by the new Date.
Preview on pc

var test = new Date ("2015-07-04 12:00");
vartest2 = new Date ("2015-07-04 11:00");
varkekka=test-test2

It still works, but if it's an iPhone debugger, it's NaN.

var time = new Date ("11:00");
console.log(time)
This will still be NaN

What should I do? Thank you.