Get first child node of specific type - JavaScript

Question

Is it possible to get a child dom element, which will be the first child of a specific type.

For example in both of these examples I want to get the img ele

Answer 1

Here is a javascript function

function getFirst(con,tag)
{
    return con.getElementsByTagName(tag)[0];
}


//html markup



//test
var con=document.getElementById('mylink');
var first=getFirst(con,'img');