var newItem = document.createElement("LI");       // Create a <li> node
var textnode = document.createTextNode("Water");  // Create a text node
newItem.appendChild(textnode);                    // Append the text to <li>

var list = document.getElementById("myList");    // Get the <ul> element to insert a new node
list.insertBefore(newItem, list.childNodes[0]);  // Insert <li> before the first child of <ul>

iframeElement.parentNode.insertBefore(insertedNode, iframeElement);

$('<a href=#>a link</a>').insertBefore('iframe')

var a=document.createElement('a')
a.innerHTML='hello world'
a.href='#'

document.body.insertBefore(a,document.getElementsByTagName('iframe')[0])