function ajaxFunction(){                    
    var ajaxRequest;  // The variable that makes Ajax possible!
    try{
        // Opera 8.0+, Firefox, Safari
        ajaxRequest = new XMLHttpRequest();
    } catch (e){
        // Internet Explorer Browsers
        try{
            ;
            ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try{
                ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e){
                // Something went wrong
                alert("Your browser broke!");
                return false;
            }
        }
    }
    // Create a function that will receive data sent from the server
    ajaxRequest.onreadystatechange = function(){
        if(ajaxRequest.readyState == 4){
            document.getElementById('avaibilityResult').innerHTML = ajaxRequest.responseText;
        }
    }
    var user = document.getElementById('txtname');
    if(user.value.length >0){
        var queryString = "?userId=" + user.value;
        ajaxRequest.open("GET", "process-availability.php" + queryString, true);
        ajaxRequest.send(null);
    }
    else{
        document.getElementById('avaibilityResult').innerHTML = '';
    }
}
function testshow()
{
    alert("Hello");
}