text: /**
   * The Sea.js plugin for embedding style text in JavaScript code
   */
  
  var RE_NON_WORD = /\W/g
  var doc = document
  var head = document.getElementsByTagName('head')[0] ||
      document.documentElement
  var styleNode
  
  seajs.importStyle = function(cssText, id) {
    if (id) {
      // Convert id to valid string
      id = id.replace(RE_NON_WORD, '-')
  
      // Don't add multiple times
      if (doc.getElementById(id)) return
    }
  
    var element
  
    // Don't share styleNode when id is spectied
    if (!styleNode || id) {
      element = doc.createElement('style')
      id && (element.id = id)
  
      // Adds to DOM first to avoid the css hack invalid
      head.appendChild(element)
    } else {
      element = styleNode
    }
  
    // IE
    if (element.styleSheet !== undefined) {
  
      // http://support.microsoft.com/kb/262161
      if (doc.getElementsByTagName('style').length > 31) {
        throw new Error('Exceed the maximal count of style tags in IE')
      }
  
      element.styleSheet.cssText += cssText
    }
    // W3C
    else {
      element.appendChild(doc.createTextNode(cssText))
    }
  
    if (!id) {
      styleNode = element
    }
  }
  