function selectContent(obj) {
  if (window.getSelection && document.createRange) {
    let sel = window.getSelection()
    let range = document.createRange()
    range.selectNodeContents(obj)
    sel.removeAllRanges()
    sel.addRange(range)
  } else if (document.selection && document.body.createTextRange) {
    let textRange = document.body.createTextRange()
    textRange.moveToElementText(obj)
    textRange.select()
  }
}