//////////////// for simple AJAX, this does not support dynamic page reload like in Yahoo/cnn
//////////////// this only reloads a value or innerHTML tag in a page.
//draw back of time delay -- after everything is typed, user must press 
//space bar.
/**
var iStartTime = 0;
var iCurTime   = 0;//to get the time delay. 
var iTimeDelay = 300;//400ms time delay in sending 
**/

var xmlHttp;
var strErrMsg;

var dynamicObj;
var propertyType; //1 = .value, 2 = .innerHTML
var retObj;// value returned from server.

var oldVal;
function InitXmlHttpObject(dynamicObj,propertyType)
{
	//if(iStartTime == 0)
	//	iStartTime = new Date().getTime();//time in ms.
	
	xmlHttp     = null;
	this.retObj = null;
	
	this.dynamicObj   = dynamicObj;
	this.propertyType = propertyType;
	if(propertyType == 1)
		oldVal = this.dynamicObj.value;
	
	try {// Firefox, Opera 8.0+, Safari
	  xmlHttp=new XMLHttpRequest();
  	}
	catch (e){// Internet Explorer
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
}

/**
State Description 
0 The request is not initialized 
1 The request has been set up 
2 The request has been sent 
3 The request is in process 
4 The request is complete 
NOTE : Complete URL is ./ajaxmain.jsp?methodRef=1&otherparameter
//ajaxmain.jsp calls a method AjaxMain.java and does all operation there
//AjaxMain.java needs methodRef to call method needed for the operation of that page event.
//other params are search criteria.
*/

function processRequest(strCompleteURL) { 
	//iCurTime  = new Date().getTime();//time in ms.
	//if( (iCurTime - iStartTime) < iTimeDelay) {
	////	iStartTime = iCurTime;
	//	return;
	//}
	//alert(iCurTime - iStartTime);
	
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",strCompleteURL,true);
	xmlHttp.send(null);
	
	//iStartTime = iCurTime;
}
function stateChanged() {
	if (xmlHttp.readyState==4) {
		//alert(xmlHttp.responseText); -- uncomment this to view error/exception... 
		this.retObj = xmlHttp.responseText;
		if(this.retObj.indexOf("Error Msg :") == 0) {
			alert(this.retObj);
			if(propertyType == 1)
				dynamicObj.value = oldVal;
			else
				dynamicObj.innerHTML = "Error in processing.";
			return;
		}
		if(propertyType == 1)
		 	dynamicObj.value     = this.retObj;
		else if(propertyType == 2)	
		 	dynamicObj.innerHTML = this.retObj;
	}
	else {
		if(propertyType == 1)
		 	dynamicObj.value     = "<img src='./images/ajax-loader2.gif";
		else if(propertyType == 2)	
		 	dynamicObj.innerHTML = "<img src='./images/ajax-loader2.gif";
	}	
}