function changecaptcha() {
    var currentTime = new Date();
    
    //alert('link clicked again');
    var img = document.getElementById("ctl00_ContentPlaceHolder1_imgCaptcha");
    img.src = "functions/CaptchaImage.aspx?h=" + currentTime.getHours + "&m=" + currentTime.getMinutes + "&s=" + currentTime.getSeconds();     
//    //img.src = 'images/img_captcha.png';
//    //jQuery.get("functions_ajax/GetCaptchaUrl.aspx", capcallback);
////    jQuery.get("functions_ajax/GetCaptchaUrl.aspx", function(data) {
////        //alert("returned something " + data);
////        img.src = data;
////    });


}

//function capcallback(data) {
//    //var qs = new QueryString(data)
//    var img = document.getElementById("ctl00_ContentPlaceHolder1_imgCaptcha");
//    var txt = document.getElementById("captchaval");
//    var code = getQueryStringArgument(data, "code");
//    
//    txt.value = code;
//    img.src = data;
//}

//function getQueryStringArgument(url, argument) {
//    var qs;
//    var args;
//    var pos1;
//    var val = "";

//    pos1 = url.indexOf("?");

//    if (pos1 >= 0) {
//        qs = url.substring(pos1 + 1)
//        args = qs.split("&")

//        for (i = 0;i<=args.length;i++) {
//            if (args[i].split("=")[0] = argument) {
//                val = args[i].split("=")[1]
//                break;
//            }
//        }      
//    }
//    
//    return val;
//}