You could do any of the following
Set each style property individually:
$("#voltaic_holder").css("position", "relative");
Set multiple style properties at once:
$("#voltaic_holder").css({"position":"relative", "top":"-75px"});
Remove a specific style:
$("#voltaic_holder").css({"top": ""});
// or
$("#voltaic_holder").css("top", "");
Remove the entire style attribute:
$("#voltaic_holder").removeAttr("style")