contact form 7 java Script

Como y donde puedo insertar java script en el plugin contatc form 7

tengo un password y otro para la validacion y quiero insertar la siguiente funcion de java pero no se como hacerlo

Muchas gracias

<script type=”text/javascript”>

function checkPass(){

//Store the password field objects into variables …

var pass1 = document.getElementById(‘password1′);

var pass2 = document.getElementById(‘password2′);

//Store the Confimation Message Object …

var message = document.getElementById(‘confirmMessage’);

//Set the colors we will be using …

var goodColor = “#66cc66″;

var badColor = “#ff6666″;

//Compare the values in the password field and the confirmation field

if(pass1.value == pass2.value){

//The passwords match.

//Set good color and inform user of correct password

pass2.style.backgroundColor = goodColor;

message.style.color = goodColor;

message.innerHTML = “Passwords Match!”

}else{

//The passwords do not match.

//Set bad color and notify the user.

pass2.style.backgroundColor = badColor;

message.style.color = badColor;

message.innerHTML = “Passwords Do Not Match!”

}

}

</script>