function ctrlA1(corp) {
  with(corp) {}
  if (document.all) {
    txt = corp.createTextRange()
    txt.execCommand("Copy")
  } else
    setTimeout("window.status=''", 5000)
}

<div id="sc1">hello <br> <b> world </b> </div>
<button onclick="ctrlA1(document.getElementById('sc1') )"></button>

function containerSelect(id) {
  containerUnselect();
  if (document.selection) {
    var range = document.body.createTextRange();
    range.moveToElementText(id);
    range.select();
  } else if (window.getSelection) {
    var range = document.createRange();
    range.selectNode(id);
    window.getSelection().addRange(range);
  }
}

<label onclick="containerSelect(this); select_all()">
  <p>hello world</p>
  <img src="imagepath.png">
</label>