JQuery :: Simple Hide And Show - Dynamic Input Fields

For example I have this sort code:
for ($i=0;$i<$db;$i++) {
$t1="toggleh$i";
echo "<div class='c'>Test<input name='$t1' type='image' id='$t1' src='test.png'/></div> <br>";
}
I try to make clear the screen for users, so I use hide & show to hide some row on screen what users actually don't need...

The JS part of code is something like this:
$('#toggleh0').click( function() {
$('div.showhide').toggle(400);
});
$('#toggleh1').click( function() {
$('div.showhide').toggle(400);
});
$('#toggleh3').click( function() {
$('div.showhide').toggle(400);
});
.
.
.
I dont know how can do this dynamic. So if "$i=6;" then I need toggle 0-6 function...