$(document).ready(function() {
        var ss="asdff";
        $(".check").click(function(){
            alert("OK");    
            $.ajax({
            type:‘get‘,
            url:‘<?php echo URL::base(true)?>purchasepay/finance/purchasepay/payaction‘,
            async:false,
            data:{pro:ss,needpay:ss},
            success:function(data)
            {
                alert(data);
            },
            error:function(){
                alert("error");
            }
        });
            });
    });

    

        $s=$_GET["pro"];
        
        echo json_encode ( $s );      

  $.each(data, function(commentIndex, comment){
                               html += ‘<div class="comment"><h6>‘ + comment[‘username‘]
                                         + ‘:</h6><p class="para"‘ + comment[‘content‘]
                                         + ‘</p></div>‘;
                         });