';
divChat.innerHTML = chatHtml;
}
/* To send request to the server using JSON */
function sendRequest(url)
{
var headTag = document.getElementsByTagName("head").item(0);
var scriptTag = document.createElement("script");
scriptTag.src = url;
headTag.appendChild( scriptTag );
}
function sendChatText(mnum,message,from,uId,lastMessage) {
if(message == '') {
alert("Please enter a message to be sent");
return;
}
else{
var param = message+"&mnum="+mnum+'&from='+from+'&userId='+uId+'&lastMessage='+lastMessage;
var url = serverUrl + 'chat.do?action=webBroadCast&message=' + param + "&output=json&callback=handleResults" ;
sendRequest(url);
}
}
/* To handle validated results from server */
function handleResults( resultsObj )
{
var chat_div = document.getElementById('div_chat');
updateHTML(resultsObj);
}
/* user authentication */
function authenticate() {
var msg = document.getElementById("msg");
if(document.getElementById('uname').value == '') {
msg.innerHTML = "Username should not be empty";
return;
}
if(document.getElementById('pwd').value == '') {
msg.innerHTML = "Password should not be empty";
return;
}
msg.innerHTML = " ";
var param = document.getElementById('uname').value+"&pwd="+document.getElementById('pwd').value;
var url = serverUrl+'chat.do?action=CheckUserExistence&uName=' + param + "&output=json&callback=loginResults";
sendRequest(url);
}
/* To handle login results from server */
function loginResults( resultsObj )
{
var chat_div = document.getElementById('div_chat');
updateUserInformation(resultsObj);
}
/* To display registration form */
function regform(){
window.open(serverUrl+'jsp/register.html','mywindowreg','width=700,height=350');
}
function showPopUp(filename,winName,attributes,winWidth,winHeight) {
attributes = attributes + ",width=" + winWidth + ",height=" + winHeight + ",left=" + (screen.width-winWidth)/2 + ",top=" + (screen.height-winHeight)/2;
var childwin = window.open(filename,winName,attributes);
}