I have 2 div shown in below with same id,
<div id="dv1" class="oldClass">Div 1</div>
<div id="dv1" class="oldClass">Div 2</div>

I need add class attribute using java script and i had implemented shown in below,
var lstObj = document.getElementsByClassName(“oldClass”);
for (var i = 0; i < lstObj.length; i++) {
jQuery("#" + lstObj[i].id).addClass("highlight");
}

but every time assign in only 1st div shown in below,
<div id="dv1" class="oldClass highlight">Div 1</div>
<div id="dv1" class="oldClass">Div 2</div>

i need add “highlight” class in both div. Please help me.

Regards,
Nirav