Using JavaScript comparison operators with current time

I am making an HTML table that should hide certain parts according to the time using JavaScript, for example;

6:30
6:45
7:05

When the current time is equal or greater than 6:30 the first cell should hide.

The way I start this is;

var now = new Date(); // to create date object
var h = now.getHours(); // to get current hour
var m = now.getMinutes(); // to get current minute

And then later;

if (h>=6 && m>=30) {
$('table#truetable tr:first').hide();
}

This does not work (I think the problem is in the last part), as it wouldn't hide this (first) cell in let's say 7:25 as the minute number then isn't greater than 30, which means this way wouldn't work in many other cases.

Can I fix this? Do I need to do it another way?