The Program

<script language="JavaScript">
  function RunScript1(){ 
    document.childNodes[0].childNodes[1].childNodes[2].childNodes[1].style.color="red";  
  }
  function RunScript2(){ 
    document.getElementsByTagName("h2")[0].style.color = "yellow"; 
  }
  function RunScript3(){ 
    document.getElementById("myh2").style.color = "white";  
  }
</script>
<h2 id="myh2">My test line</h2>
<p>
 <input onClick="RunScript1()" type="button" value="Full Path Red"> 
 <input onClick="RunScript2()" type="button" value="From Tag List Yellow">
 <input onClick="RunScript3()" type="button" value="Via ID White">
</p>