Using javascript to manipulate css elements, dash margin-left

Question

I'm trying to use this

document.getElementById('menu2').style.marginleft = "5%";

To manipulate the margin-left: 20%; to become margin-left: 5%;

I don't know what to do with the dash, if it's a single word like style.width, it's no problem, but a dash seems problematic, what do I do?

Answer 1

请改用marginLeft ，并使用marginLeft “ L”。

Answer 2

can use this

$('#menu2').css({"marginLeft":"5%"});

Fiddle Here