var xmlHttp

function getData(str1, str2) {

	// for back button functionality
	window.location.hash = str1+ ".php?id=" + str2;

	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
		alert ("Please enable Javascript on your browser");
		return;
	}
//	alert(str1);




	url = "getajaxdata.php";
	url = url+"?table="+str1;
	url = url+"&id="+str2;
	url = url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function getMonthData(form) {
	var str1 = form.options[form.selectedIndex].value.replace(/\s+/g,'');
//	alert(str1);

	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
		alert ("Please enable Javascript on your browser");
		return;
	}
	url = "getajaxmonth.php";
	url = url+"?id="+str1;
	url = url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() {
	if (xmlHttp.readyState==4) {
/*		document.imgDisplay.src=xmlHttp.responseText;	*/
		document.getElementById("centercolumn").innerHTML=xmlHttp.responseText;
	}
}

function GetXmlHttpObject() {
	var xmlHttp=null;
	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");
		}
	}
	return xmlHttp;
}