dumb prefix

prefix.js

var p = document.createElement('p');
var prefixes = ['webkit','Moz','ms','O'];
var len = prefixes.length;
var style = p.style;
p = null;

module.exports = prefix;

function prefix(prop) {
 for (i = 0; i < len; i++) {
    name = prefixes[i] + prop;
    if (style[name] !== undefined) {
      return '-' + prefixes[i].toLowerCase() + '-' + prop;
    }
  }
  return prop;
}