function get_message(div_id,sender)
{
    online(div_id,sender);
    setInterval ("get_new_message('"+div_id+"',"+sender+")", 1500 );  
}
function send_message(div_id,content_id,sender)
{
	myDate1 = new Date(); 
    timestamp1 = myDate1.getTime();
	subject_id = div_id;
	content = document.getElementById(content_id).value;
	if(content.length)
	{
		document.getElementById(content_id).value = "";
		document.getElementById(content_id).focus();
		http.open("GET", "function/script_page.php?uid="+sender+"&set=1&t="+timestamp1+"&content=" + escape(content), true);
		http.onreadystatechange = handleHttpResponse;
		http.send(null);
	}
}	
function get_new_message(div_id,sender)
{
	myDate = new Date(); 
	timestamp = myDate.getTime();
	subject_id = div_id;
    http.open("GET", "function/script_page.php?uid="+sender+"&get=1&t="+timestamp+"", true);
	http.onreadystatechange = handleHttpResponse;
	http.send(null);
}
function online(div_id,sender){
    http.open("GET", "function/script_page.php?uid="+sender+"&online=1", true);
	http.onreadystatechange = handleHttpResponse;
	http.send(null);
}