php+ajax ปัญหาคือมันไม่ยอมเข้าฟังชั่นอะครับ ผู้รู้ช่วยทีครับ

<script language="javascript">
var xmlHttp; 
var xmlHttp2;        
var completeDiv;       
var inputField;       		
var p;	
var q;	
var aod;
var aod2;
var time;
var spname;  
  function createXMLHttpRequest() 
{            
if (window.ActiveXObject) 
{               
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");           
}           
else if (window.XMLHttpRequest) 
{               
xmlHttp = new XMLHttpRequest();                          
}      
}
        
  function initVars() 
{            
inputField = document.getElementById("txtnames");                     
}

        

   function findNames() 
{            
initVars();        
if (inputField.value.length > 0) 
{                
createXMLHttpRequest();                           
var url = "stadiumshowprice.php?txtnames=" + inputField.value;                
xmlHttp.open("GET", url, true);
spname=inputField.value;
//alert(url);   
//alert(inputField.value);       
//alert("step1"); 
xmlHttp.onreadystatechange = callback;                
xmlHttp.send(null);            
} 
else 
{                
alert("step1 erer");            
}       
}

        
  function callback() 
{           
if (xmlHttp.readyState == 4) 
{              
if (xmlHttp.status == 200) 
{
//alert("step 2 ");				    
startRequest();
} 
else if 
(xmlHttp.status == 204)
{
alert("step 2 erer");
}            
}        
}
        
 function startRequest()
 
            {
 	    createXMLHttpRequest();
             xmlHttp.open("get","stadiumshowprice.php?txtnames="+inputField.value,true);
             xmlHttp.onreadystatechange = function () 
                   {
                if (xmlHttp.readyState == 4) {
                    if (xmlHttp.status == 200) {
                        displayInfo(xmlHttp.responseText);
				   //alert("step 3");
                    } 
                else 
                    {
                        displayInfo("พบข้อผิดพลาด: " + xmlHttp.statusText); 
                        alert("step 3 erer");
                    }
                    }            
                    };
                xmlHttp.send(null);
                    }

                function displayInfo() 
                    {
                aod = document.getElementById("divInfo").innerHTML = xmlHttp.responseText;
                //alert("step 4");
		//alert(aod); 
                    }
					
					
					  </script>
<link rel="STYLESHEET" type="text/css" href="dhtmlxCalendar/codebase/dhtmlxcalendar.css">
<script>
window.dhx_globalImgPath="dhtmlxCalendar/codebase/imgs/";
</script>
<script  src="dhtmlxCalendar/codebase/dhtmlxcommon.js"></script>
<script  src="dhtmlxCalendar/codebase/dhtmlxcalendar.js"></script>
	<script>
	var mCal;
	window.onload = function () {
		mCal = new dhtmlxCalendarObject('dhtmlxCalendar', false, {isYearEditable: true});
		mCal.loadUserLanguage('en-us');
		mCal.setYearsRange(2000, 2500);
		mCal.attachEvent("onClick",mSelectDate);
		mCal.draw();

		
	}
	
	function mSelectDate(date) 
	{
		document.getElementById('mCalInput').innerHTML = mCal.getFormatedDate("%d-%m-%Y", date);
		//alert(mCal.getFormatedDate("%d-%m-%Y", date));
                time =mCal.getFormatedDate("%d-%m-%Y", date);
                //alert (time);
                //alert (aod);
                //alert(spname);
                findreserv();  
                return true;        
	}


function createXMLHttpRequest2() 
{          
if (window.ActiveXObject) 
{ 
alert("step XML");              
xmlHttp2 = new ActiveXObject("Microsoft.XMLHTTP");           
}          
else if (window.XMLHttpRequest) 
{      
alert("step XML erer");          
xmlHttp2 = new XMLHttpRequest();                          
}      
}     
           
function findreserv() 
{
alert ("step 5"); 
//alert (time);
//alert (aod);
//alert(spname); 
initVars2();        
if (inputField.value.length > 0) 
{                
createXMLHttpRequest2();                        
var url = "stadiumshowreserv.php?time="+inputField1+"&spname="+inputField2;              
xmlHttp2.open("GET", url, true);
//alert(url);          
//alert("step 5.1"); 
xmlHttp2.onreadystatechange = callreserv;                
xmlHttp2.send(null);            
} 
else 
{                
alert("step5.1 erer");            
}          
}

function initVars2() 
{  
alert("step6");          

inputField1 = time;
inputField2 = spname;
//alert(inputField1);
//alert(inputField2);
                      
}
function callreserv() 
{           
if (xmlHttp2.readyState == 4) 
{              
if (xmlHttp2.status == 200) 
{
alert("step 7");
startRequest2();				    
} 
else if 
(xmlHttp2.status == 204)
{
alert("step 7 erer");
}            
}        
}
        
function startRequest2()
            {
            alert("step 8");
 	    createXMLHttpRequest2();
            xmlHttp2.open("get","stadiumshowreserv.php?time="+inputField1+"&spname="+inputField2.value,true); 
            xmlHttp2.onreadystatechange = function () 
                   {
                if (xmlHttp2.readyState == 4) {//<<มันไม่ยอมเช็คตัวนี้อะครับ
                    if (xmlHttp2.status == 200) {
                        displayInfo2(xmlHttp2.responseText);
				   alert("step 8.1");
                    } 
                else 
                    {
                        displayInfo2("พบข้อผิดพลาด: " + xmlHttp2.statusText); 
                        alert("step 8.1 erer");
                    }
                    }            
                    };
                xmlHttp2.send(null);//<<มันเล่นเด้งมานี่เลย
                    alert("step 8.2"); 
                    }


                function displayInfo2() 
                    {
                aod2 = document.getElementById("divInfo2").innerHTML = xmlHttp2.responseText;
                alert("step 9");
		alert(aod2); 
                    }


</script>
<script>
window.dhx_globalImgPath="dhtmlxCalendar/codebase/imgs/";
</script>