点击按钮 复制文本

<script>
$(function(){
  $("#d_clip_button").click(function(){
    var Url=$("#yao_txt").text();
    copyToClipboard(Url);
 });
});
function copyToClipboard(){
    var maintext =  document.getElementById("copy").innerHTML;
  if (window.clipboardData){
    window.clipboardData.setData("Text", maintext);
    }else if (window.netscape){
      try{
        netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
    }catch(e){
        alert("该浏览器不支持一键复制！请手工复制文本框链接地址～");
    }

    var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
    if (!clip) return;
    var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
    if (!trans) return;
    trans.addDataFlavor('text/unicode');
    var str = new Object();
    var len = new Object();
    var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
    var copytext=maintext;
    str.data=copytext;
    trans.setTransferData("text/unicode",str,copytext.length*2);
    var clipid=Components.interfaces.nsIClipboard;
    if (!clip) return false;
    clip.setData(trans,null,clipid.kGlobalClipboard);
  }
  alert("以下内容已经复制到剪贴板nn" + maintext);
}
</script>
<!--
<span style="font-size: 16px; color: green;" id="copy">被复制的内容............</span>
<input type="button" οnclick="copyToClipboard()" value="复制链接" />-->
<iframe width='1400px' height='800px;' class='preview-iframe' scrolling='no' frameborder='0' src='http://download.youkuaiyun.com/source/preview/4879122/8d3e1052af7d210e6e892ea57f736d9a' ></iframe>