Highlight some word and try to drag to some place or in the text area see if it will copy what you highlight

<!-- <script language="JScript" for="document" event="ondragstart"> var a=document.getElementById("S1"); window.event.dataTransfer.setData("Text", "The text drag is change this is used for no copying of data"); // and provides text to drop in second. window.event.dataTransfer.effectAllowed = "copy"; // Copies text. a.value= window.event.dataTransfer.getData("Text"); // Specifies data format to retrieve. --> </script>