AJAX Form Feld von PHP Script anfügen

function getStep(campID) {
	
	var url = 'get_step.php';  
	var pars = 'campID='+campID;  
	moreStep.style.visibility = 'visible';  
		var myAjax = new Ajax.Request(
		url, 
		{
			method: 'POST',   
			parameters: pars,
			onComplete: zeige_step
		});
}


function zeige_step(request){ 
	$('moreStep').innerHTML += request.responseText;   
	 // alert( request.responseText ); 
}

session_start();
include_once("class/dbhandler.class.php");  
$db 		= new DbHandler();
$db->mySqlConnect();
$campID 	= $_POST['campID'];  
$today		= date("Y-m-d H:i:s");  
$uid		= $_SESSION['uid'];  

// get step id

$insert_step = "insert into cat.step (create_date,create_by,campaign_id)  
values (sysdate(),'$uid','$campID')";  

mysql_query($insert_step);
$step_id = mysql_insert_id();

$count_step = "select id from cat.step where campaign_id='$campID'";  
$cres = mysql_query($count_step);
$stepnumber = mysql_num_rows($cres);

	echo "<br /><br />Step: $stepnumber, StepID: $step_id  
	<table width=920px>
	<tr>
	<td class=tdtitle style=\"width:25%\">Step Name</td>  
	<td class=feld colspan=7><input type=\"text\" id=\"campStepName\" name=\"campStepName\"/>\n</td>  
	
	</tr>
	
	<tr>
	<input type=\"hidden\" name=\"stepNum\" value=\"$stepnumber\">  
	<input type=\"hidden\" name=\"stepId\" value=\"$step_id\">  
	<td class=tdtitle>Target Quantity</td>
	<td class=feld colspan=7><input type=\"text\" id=\"campTargetQtyFT\" name=\"campTargetQtyFT\"/>\n</td>  
	</tr>
	
	<tr>
	<td class=tdtitle>Channels
	<p class=cAdditional>What channel is being used (call center, DM etc.) for In- and Outbound</p></td>
	<td class=feld colspan=6>";  
	// checkbox für die kommunikations kanäle
		$q_campChannelsCB = "select distinct id, show_text from cat.constant where area='campChannelsCB' order by foreign_id ASC, show_text ASC";  
		$r_campChannelsCB = mysql_query($q_campChannelsCB);
		echo "<table class=tablecb cellspacing=0><tr>\n";  
		$count = 0;
		while($rr_campChannelsCB = mysql_fetch_array($r_campChannelsCB)){
			echo "<td class=feldcb><input type=\"checkbox\" name=\"campChannelsCB\" value=\"".$rr_campChannelsCB['id']."\" id=\"".$rr_campChannelsCB['show_text']."_$stepnumber\"><label for=\"".$rr_campChannelsCB['show_text']."_$stepnumber\">&nbsp;".$rr_campChannelsCB['show_text']."</td>\n";  
			$count++;
			if($count == 5){
				echo "</tr><tr>\n";  
				$count = 0;
			}
				
		}
		$rest = 5-$count; // bestimmen wieviele leere <td> noch benötigt werden
		for($c = 0; $c < $rest; $c++){
			echo "<td class=feldcb></td>\n";  
		}
		echo "</tr></table>\n";  
		
	echo "</td>  
	</tr>
	
	<tr>
	<td class=tdtitle>Communication Period Start
	<p class=cAdditional>Start and end date of campaign</p></td>
	<td class=feld><input type=\"text\" id=\"campComPeriodStartCA_$stepnumber\" name=\"campComPeriodStartCA\">YYYY-MM-DD  
	</td>
	<td class=tdtitle>Comminication Period End</td>
	<td class=feld colspan=4><input type=\"text\" id=\"campComPeriodEndCA_$stepnumber\" name=\"campComPeriodEndCA\">YYYY-MM-DD</td>  
	</tr>
	<tr>";