como imprimir o registro do banco de dados quando o usuário seleciona as opções do menu suspenso? programa dinâmico

$('<div>
<!--adding onchange and passing selected value to it-->
 <select class="selected-meal-type" onchange ="sendInfo(this.value);">
<option value="TYPE A">TYPE A</option>
<option value="TYPE B">TYPE B</option>
<option value="TYPE C">TYPE C</option>
 </select>&nbsp;&nbsp;<span id="amit" /></span>
 </div>
 <br>').appendTo('#container');

        function sendInfo(str)//str will have value selected from dropdown list   
                {  
                   //attaching this value in url
                    var url="process.jsp?val="+str;  
                   if(window.XMLHttpRequest)
                    {  

                        request=new XMLHttpRequest();  
                    }  
                    else if(window.ActiveXObject)
                    {  
                        request=new ActiveXObject("Microsoft.XMLHTTP");  
                    }  


                        request.onreadystatechange= function() {
            if (this.readyState == 4 && this.status == 200) {
                document.getElementById("amit").innerHTML = this.responseText;
               }
            }; 
                        request.open("GET",url,true);  
                        request.send();  
                   }