function RefreshVerifyCode(imgID) {
    var $imgVerifyCode = $("#" + imgID);
    var newSrc = GLOBAL_RootPath + '/Common/VerifyCode.aspx?rnd=' + GenerateSimGuid();
    $imgVerifyCode.attr("src", newSrc);
}

function ClearVerifyCodeAndText(tbClientID, defaultText) {
    var $imageContainer = $("#VerifyCodeImageContainer_" + tbClientID + " div");
    $imageContainer.children("img").empty();
    $imageContainer.hide();
    $("#" + tbClientID).val(defaultText);

}

function ShowVerifyCode(objTextBox, defaultText) {
    if ($(objTextBox).val() == defaultText) {
        $(objTextBox).val('');
    }
    var textBoxClientID = $(objTextBox).attr("id");
    var $imageContainer = $("#VerifyCodeImageContainer_" + textBoxClientID + " div");
    var imgID = "vcImage_" + textBoxClientID;

    if ($imageContainer.css("display") == "none") {
		if ($imageContainer.children("img").length==0) {
			var $imgVerifyCode = $('<img id="' + imgID + '" width="48" height="22" style="cursor:pointer;" alt="看不清？点击换一个" onclick="RefreshVerifyCode(\'' + imgID + '\');"  src="' + GLOBAL_RootPath + '/Common/VerifyCode.aspx?rnd=' + GenerateSimGuid() + '" />');
			$imageContainer.append($imgVerifyCode); //添加
		}
		else {
			RefreshVerifyCode($imageContainer.children("img").attr("id"));
		}
        $imageContainer.fadeIn('fast'); //显示
    }
}