I am used to doing this in jQuery

$('#RememberMe').attr('checked', true); 

but I can't remember how to do it in Javascript I thought that

document.getElementById(RememberMe).value = True; 

would work, but it doesn't, it changes the value but does not create the visual check on the html.

I am trying to set the checkbox to on by default. here is the html

<input id=RememberMe name=RememberMe type=checkbox value=false />