$.AJAX()

var rand = new Date().getTime();
$.ajax({
async: false,
type: "GET",
url: "./Handler/CheckCSFinish.ashx?CFilePath=" + CFilePath + "&Mac=" + mac + '&rand=' + rand,
//data: { CFilePath: CFilePath, MAC: mac },
dataType: "text",
success: function (data) {
//alert('CheckCS(CFilePath)-success');
if (data == '1') {
//monitorInterval = null;
window.clearInterval(monitorInterval)
$("#contentImg").attr('src', 'Files/' + GFilePath);
//alert('CheckCS--AJAX-SUCCESS' + './Files/' + GFilePath);

}

},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert('CheckCS(CFilePath)-failed');
alert(XMLHttpRequest);
alert(textStatus);
alert(errorThrown);
//monitorInterval = null;
window.clearInterval(monitorInterval)
}
});