按钮完成复制和剪切功能

<SCRIPT language=JavaScript>function copy(ob){var obj=findObj(ob); if (obj) { obj.select();js=obj.createTextRange();js.execCommand("Copy");}}function cut(ob){var obj=findObj(ob); if (obj) { obj.select();js=obj.createTextRange();js.execCommand("Cut");}}function findObj(n, d) { //v4.0  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);  if(!x && document.getElementById) x=document.getElementById(n); return x;}//--></SCRIPT><input type="button" name="Button" value="复制到剪贴板" onClick=copy('txtOutput')><input type="button" name="Button" value="剪贴到剪贴板" onClick=cut('txtOutput')>    <br><form name="fom1" method="post" action="">    <textarea name="txtOutput" rows="5" cols="50"> dfkghkldfghklsdjfhgklsdfhgklhsdfklghsdfklhj</textarea>  </form>

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