Page 1.
<form action="Page2" method="post">
To:<input type="Text" name="to">

Message:<input type="text" name="text">


<input type="submit" value="send">
</form>

Page 2.
<cfoutput>
<cfhttp url="http://api.clickatell.com/http/sendmsg" method="POST" resolveurl="false">
<cfhttpparam type="FORMFIELD" name="api_id" value="xxxxxxx">
<cfhttpparam type="FORMFIELD" name="user" value="xxxxxxx">
<cfhttpparam type="FORMFIELD" name="password" value="xxxxxxx">
<cfhttpparam type="FORMFIELD" name="text" value="#form.text#">
<cfhttpparam type="FORMFIELD" name="to" value="#form.to#">
</cfhttp>
</cfoutput>