To Create Iframe Dyanamically

 Below is the Javascript function to create Iframe at any click event of link or button
<script>
function makeFrame(){
   var aa = document.getElementById('pdfpath').value;
   ifrm = document.createElement("IFRAME");     //will create an Element IFrame
   ifrm.setAttribute("src", aa);  
   ifrm.style.width = 200+"px";
   ifrm.style.height = 200+"px";  
   ifrm.setAttribute("id", "my_iframe");
   document.body.appendChild(ifrm);
}
</script>