按鈕完成復制和剪切功能

 <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="復制到剪貼板" onClick=copy('txtOutput')> <input type="button" name="Button" value="剪貼到剪貼板" onClick=cut('txtOutput')>     <br><form name="fom1" method="post" action="">     <textarea name="txtOutput" rows="5" cols="50"> dfkghkldfghklsdjfhgklsdfhgklhsdfklghsdfklhj