Ajax tramite bottone

[Zomer]

Salve ragazzi come posso fare in modo che questo script ajax mi salvi solo tramite un tasto e che non faccia di testa sua? :master:

<script type="text/javascript">
 // <![CDATA[
   Sortable.create("firstlist",
     {
     dropOnEmpty:true,handle:'handle',containment:["firstlist","secondlist","thirdlist"],constraint:false,

      onUpdate:function(){
      var myAjax = new Ajax.Request("save.php", {method:'get',parameters:Sortable.serialize('firstlist')+"&"+Sortable.serialize('secondlist')+"&"+Sortable.serialize('thirdlist')}) }});

   Sortable.create("secondlist",{
   dropOnEmpty:true,handle:'handle',containment:["firstlist","secondlist","thirdlist"],constraint:false,
     onUpdate:function(){
     var myAjax = new Ajax.Request("save.php", {method:'get',parameters:Sortable.serialize('firstlist')+"&"+Sortable.serialize('secondlist')+"&"+Sortable.serialize('thirdlist')}) }});

   Sortable.create("thirdlist",{
     dropOnEmpty:true,handle:'handle',containment:["firstlist","secondlist","thirdlist"],constraint:false,
     onUpdate:function(){
     var myAjax = new Ajax.Request("save.php", {method:'get',parameters:Sortable.serialize('firstlist')+"&"+Sortable.serialize('secondlist')+"&"+Sortable.serialize('thirdlist')}) }});
 // ]]>
 </script>