<?php
	/**
	 * This class helps creating simple AJAX application
	 * 
	 * @author Rochak Chauhan
	 */
	class Ajax{
		
		/**
		 * Constructor function
		 */
		function Ajax($htmlObjectId) {
			print '<script src="ajax.js" type="text/javascript"></script>';
			print "<script type=\"text/javascript\" language=\"JavaScript\"> createRequestObject('$htmlObjectId');</script>";
		}
		
		/**
		 * This fucntion calls the remote file with certain parameters
		 *
		 * @param string $remoteFileName (filename with extension)
		 * @param [array $parameterNames] (names of all the parameters to be sent)
		 * @param [array $parameterValues] (corresponding values of the parameters)
		 * 
		 * @return void
		 */
		function sendRequest($remoteFileName, $parameterNames = array(), $parameterValues = array()) {
			
			if (count($parameterNames) == count($parameterValues)) {
				$parameterNames = implode(',', $parameterNames);
				$parameterValues = implode(',', $parameterValues);
                		
				print "<script type=\"text/javascript\" language=\"JavaScript\"> sendReq('$remoteFileName', '$parameterNames', '$parameterValues');</script>";
			}
			else{			
				die("'Parameter Names' and 'Parameters Values' do NOT match.");
			}
		}
		
		/**
		 * This function returns the response as simple string/xml
		 * @package [$asXml] boolean
		 * 
		 * @return string
		 */
		function getResponse($asXml = false) {
			if ($asXml) {
			
				return "<script type=\"text/javascript\" language=\"JavaScript\"> document.write(responseXml);</script>";	
			}
			else {
				return "<script type=\"text/javascript\" language=\"JavaScript\"> alert(responseText);document.write(responseText);</script>";
			}
		}
				
	}
?>