Can anybody help me with RSForm javascript.
I put this script in
( Javascript You can add your Javascript declarations here. Remember to add the <script> tags )

<script type="text/javascript">
function preV(param1, param2, param3, param4)
{
if (param2 == 1 && param3 == 1)
{
document.getElementById('nameP').innerHTML = document.getElementById('Name').value;
document.getElementById('emailP').innerHTML = document.getElementById('Email').value;
document.getElementById('messageP').innerHTML = document.getElementById('Message').value;

var i;
for(i=0;i<document.getElementsByName('form[RadioGroup]').length;i++)
if (document.getElementById('RadioGroup'+i).checked)
document.getElementById('radioGroupP').innerHTML = document.getElementById('RadioGroup'+i).value;
var j;
for(j=0;j<document.getElementsByName('form[CheckGroup][]').length;j++)
if (document.getElementById('CheckGroup'+j).checked)
document.getElementById('checkGroupP').innerHTML += " " + document.getElementById('CheckGroup'+j).value;
}
rsfp_changePage(param1, param2, param3, param4);
}
</script>

I seems RSForm don't recognize javascript.
How can i fixed this ?

Hello,

You can find the full tutorial here. This also requires a small PHP script (which is also provided in the article - bottom section) that changes the default pagination function with this custom one (you've either missed this step or you're having incorrect declarations within the script).

For further difficulties, a direct URL where we can view your form in the frontend area would help.