Thanx alot...work for me in IE10 to and IE11

function pasteit()
{
var editor = document.getElementById("ta1");
editor.focus();
document.execCommand('Paste');
}

function copyToClipboard()
{
var input = document.getElementById("ta1");
input.focus();
document.execCommand('Copy');
if ( document.selection ) {
document.selection.empty();
} else if ( window.getSelection ) {
window.getSelection().removeAllRanges();
}
}

On 25th June 2016