<script>
function googles()
{
s = document.google.search.value
window.open('http://www.google.com/search?q=' + s)
}
</script>
<h3>Google Search</h3>
<form name = 'google' method = 'post'>
Enter Search Term:<input type = 'text' value = '' name = 'search'>
<p><input type = 'button' onclick = 'googles()' value = 'Search'>
</form>

Easy form to use.  Just enter the item to be searched and click the search button.  Great for comment boards and blogs, even forums.

Simple Google Search Form

JavaScript