(el → dom, att → string)
return boolen
- check if has attribute
function (el, att) {
  var result = false
  if (/^\.[\w]+/.test(att)) {
    var className = att.match(/^\.([\w]+)/)[1]
    var gClass = el.className.split(' ')
    if (gClass.indexOf(className)>-1) {
      result = true
    }
  }
  if (/^\#[\w]+/.test(att)) {
    var idName = att.match(/^\#([\w]+)/)[1]
    if (el.hasAttribute('id') && el.getAttribute('id')===idName) result = true
  }
  if (/^\[[\w]+=\"[\w]+\"\]$/.test(att)) {
    var attr = att.match(/^\[([\w]+)=\"([\w]+)\"\]$/)
    var attName = attr[1]
    var attval = attr[2]
    if (el.hasAttribute(attName) && el.getAttribute(attName)===attval) result = true
  }
  if (/^\[[\w]+=\'[\w]+\'\]$/.test(att)){
    var attr = att.match(/^\[([\w]+)=\'([\w]+)\'\]$/)
    var attName = attr[1]
    var attval = attr[2]
    if (el.hasAttribute(attName) && el.getAttribute(attName)===attval) result = true
  }
  return result
}