function ajaxLoad(method, URL, data, displayId){
	var ajax = null;
	if(window.ActiveXObject){
		ajax = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if (window.XMLHttpRequest){
		ajax = new XMLHttpRequest();	
	}
	else{
		alert("Your browser does't support Ajax");
		return;
	}

	method = method.toLowerCase();

	URL += "?dummy=" + (new Date()).getTime();
	if(method.toLowerCase() == "get"){
		URL += "&" + data;
		data = null;
	}

	ajax.open(method, URL);

	if(method.toLowerCase() == "post"){
		ajax.setRequestHeader("Content-Type","text/html; charset=tis-620");
	}

	ajax.onreadystatechange = function(){
		if(ajax.readyState == 4 && ajax.status == 200){
			var ctype =	ajax.getResponseHeader("Content-Type");
			ctype = ctype.toLowerCase();
		
			ajaxCallback(ctype, displayId, ajax.responseText);
		
			delete ajax;
		
			ajax = null;
		}
	}

	ajax.send(data);
}

function ajaxCallback(contentType, displayId, responseText){
	if(contentType.match("text/javascript")){
		eval(responseText);
	}
	else{
		var el = document.getElementById(displayId);
		el.innerHTML = responseText;
	}
}

function getFormData(form_name_or_id){
	
	var frm = document.forms[form_name_or_id];
	if(frm == null){
		alert("form not found!");
		return;
	}

	var data = "";
	var num_el = frm.element.length;
	for(i = 0; i<num_el; i++){
		var el = frm.element[i];
		if(el.name == "" && el.id == ""){
			continue;	
		}
		var param_name = "";
		if(el.name != ""){
			param_name = el.name;	
		}
		else if(el.id != ""){
			param_name = el.id;	
		}
	
		var t = frm.element[i].type;
		var value = "";
		if(t == "text" || t == "password" || t == "hidden" || t == "textarea"){
			value = encodeURI(el.value);	
		}
		else if(t == "radio" || t == "checkbox"){
			if(el.checked){
				value = encodeURI(el.value);
			}
			else{
				continue;	
			}
		}
		else if(t == "select-one"){
			value = encodeURI(el.options[el.selectedIndex].value);	
		}
		else if( t == "select-multiple"){
			for(j = 0; j < el.length; j++){
				if(el.options[j].selected){
					if(data != ""){
						data += "&";	
					}
					data += param_name + "=";
					data += encodeURI(select.options[j].value);
				}
			}
		
			continue;
		}
		if(data != ""){
			data += "&";
		}
	
		data += param_name + "=" + value;
	}
	
	return data;

}