Dual Function Button (ing)

<script type="text/javascript">
/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Mr J | http://www.huntingground.net/ */
var i=0

function dualButt(){
  i++
  if (i==1){
    one()
    document.forms[0].elements[0].value="One"
  }

  if (i==2){
    two()
    document.forms[0].elements[0].value="Two"
    i=0
  }
}

function one(){
  alert('This is would be the first function')
}

function two(){
  alert('This is would be the second function')
}
</script>


<form>
<input type="button" value="One" onClick="dualButt()">
</form>