function ajax_avail(fld){
var page = fld.value;



if(page=="")

{

	alert("Please enter user id");

	fld.focus();

	return false;

}


var xmlhttp=false; //Clear our fetching variable
        try {

                xmlhttp = new ActiveXObject('Msxml2.XMLHTTP'); //Try the first kind of active x object…

        } catch (e) {



                try {



                        xmlhttp = new



                        ActiveXObject('Microsoft.XMLHTTP'); //Try the second kind of active x object



            } catch (E) {



                xmlhttp = false;



                        }



        }



        if (!xmlhttp && typeof XMLHttpRequest!='undefined') {



                xmlhttp = new XMLHttpRequest(); //If we were able to get a working active x object, start an XMLHttpRequest



        }



        	//This is the path to the file we just finished making *



		



   var file = 'checkavailability.php?page='; 



	xmlhttp.open('GET', file + page, true); //Open the file through GET, and add the page we want to retrieve as a GET variable **



    xmlhttp.onreadystatechange=function() {



        if (xmlhttp.readyState==4) { //Check if it is ready to recieve data



                var ava = xmlhttp.responseText; //The content data which has been retrieved ***



                if( ava ){ //Make sure there is something in the content variable



					var avaDemo="<select name='description' class='fieldform'><option readonly>Choose Description</option></select>";



					document.getElementById('ava').innerHTML = ava; 



					//Change the inner content of your div to the newly retrieved content ****



                }



        }



        }



        xmlhttp.send(null) //Nullify the XMLHttpRequest



return false;



}