select_all.js

// onclick="select_all(this)"

function select_all(el) {
  if (typeof window.getSelection != "undefined" && typeof document.createRange != "undefined") {
    var range = document.createRange();
    range.selectNodeContents(el);
    var sel = window.getSelection();
    sel.removeAllRanges();
    sel.addRange(range);
  } else if (typeof document.selection != "undefined" && typeof document.body.createTextRange != "undefined") {
    var textRange = document.body.createTextRange();
    textRange.moveToElementText(el);
    textRange.select();
  }
}