JS copies specific content to the pasteboard

A relatively simple test code for copying content to the pasteboard <script language=javascript>

function readTxt()

{

alert(window.clipboardData.getData(text));

}

function setTxt()

{

var t=document.getElementById(txt);

t.select();

window.clipboardData.setData('text',t.createTextRange().text);

}

</script>

<input name=txt value=test>

<input type=button value=copy onclick=setTxt()>

<input type=button value=read onclick=readTxt()>