How to make jAlert() like 'Please Wait' message.(without OK Button)

Question 1

Please check this fiddle http://jsfiddle.net/Bumts/2/.

There has been some modifications in the core jquery.alert.js, since there has been no overlay param. I made the changes to pass overlay (6th parameter) option to pass for it. You could replace the jquery.alert js code with my modified one.

$(function(){
$('#test').click(function(){$('#test3').jAlert('This is a jAlert Warning Box',"warning",'warningboxid', '', '', 1);});
});

Question 2

Use JQuery events !!

Example :: Case 1 : If you are trying to trigger your button after an interval then use

setInterval( "clickRight()", 5000 );

function clickRight()
{
   $('.slide_right').trigger('click'); 
};

Case 2 : If you are waiting for user to type some thing on to an input field

$('#form').on('mousedown',function(e)
{
 if(e.which===1)
 {
   //call your function alerting message here//      
 }
}

Short Code ::

<!DOCTYPE html>
<html>
<head>
  <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>

<input id="whichkey" value="type something">
<div id="log"></div>
<script>
$('#whichkey').on('mousedown',function(e){
    alert("Error");
});
</script>

</body>
</html>