function (css, el) {
  var style = el.style
  if (isObject(css)) {
    var key
    for (key in css) {
      if (isDefine(style[cssjs(key)])) style[cssjs(key)] = css[key]
    }
  }
  if (isArray(css)) {
    var size = css.length
    var i
    for (i = 0; i < size; i++){
      if (isDefine(style[cssjs(css[i])])) style[cssjs(css[i])] = ""
    }
  }
}
function (css, el) {
  var style = el.style
  if (isObject(css)) {
    var key
    for (key in css) {
      if (isDefine(style[cssjs(key)])) style[cssjs(key)] = css[key]
    }
  }
  if (isArray(css)) {
    var size = css.length
    var i
    for (i = 0; i < size; i++){
      if (isDefine(style[cssjs(css[i])])) style[cssjs(css[i])] = ""
    }
  }
}
function ( css , el ) { var style = el . style if ( isObject ( css ) ) { var key for ( key in css ) { if ( isDefine ( style [ cssjs ( key ) ] ) ) style [ cssjs ( key ) ] = css [ key ] } } if ( isArray ( css ) ) { var size = css . length var i for ( i = 0 ; i < size ; i ++ ) { if ( isDefine ( style [ cssjs ( css [ i ] ) ] ) ) style [ cssjs ( css [ i ] ) ] = "" } } }
(css →  object | array, el → dom)
- add and remove style of element
( css → object | array el → dom ) - add and remove style of element