Hi Everyone!

I want a copy to clipboard functionality using visualforce page. 
I used the following example as: 

<apex:page title="Clipboard Test" >
<apex:messages />
    <script language="JavaScript">
        function ClipBoard(copytextid, holdtextid){
            copyToClipboard(copytextid);
        }
        function copyToClipboard(elementId) {
          // Create an auxiliary hidden input
          var aux = document.createElement("input");
          // Get the text from the element passed into the input
          aux.setAttribute("value", document.getElementById(elementId).innerHTML);
          // Append the aux input to the body
          document.body.appendChild(aux);
          // Highlight the content
          aux.select();
          // Execute the copy command
          document.execCommand("copy");
          // Remove the input from the body
          document.body.removeChild(aux);
        }    
    </script>   
    <apex:pageblock >
    <apex:form >
        <apex:outputpanel ID="copytext" STYLE="height:150;width:162;background-color:pink">
            <p style="border-style: dashed;" class="borderclass">
                Hi Azure Admin,<br/><br/>

                I'm setting up a SharePoint integration with Salesforce using sFiles. Please create a new Azure App Registration using the 
                <span style="color:rgb(63,137,143);"><b>Redirect URI:</b></span> <br/>
                <a href="https://www.google.com">https://www.google.com </a> <br/><br/>

                Please follow the instructions here: <br/><br/>
                 
                Finally, please provide me with the following information:<br/><br/>
                    
                - Azure Application (client) ID:<br/>
                - Azure Directory (tenant) ID:<br/>
                - Application Client Secret:<br/>

            </p>

        </apex:outputpanel> 
        <apex:inputtextarea ID="holdtext" STYLE="display:none;"></apex:inputtextarea>
        <apex:commandbutton onClick="ClipBoard('{!$Component.copytext}', '{!$Component.holdtext}');" rerender="copytext" value="Copy to Clipboard"/> 
    </apex:form>
    </apex:pageblock>
</apex:page>

But the problem is that, the html tags are also copied that shouldn't be coiped. 

Could you please help me in this. 

Thank you so much!