if(document.domain.indexOf("gyyx.cn") > -1)
{
    document.domain = "gyyx.cn"
};

window.onload = fixImage;

var supported = /MSIE ((5\.5)|[6789])/.test(navigator.userAgent) &&
				navigator.platform == "Win32";

var realSrc;
var blankSrc = "http://www.gyyx.cn/stage_images/spacer.gif";

function propertyChanged() {
    var element = document.getElementById("captcha_image");

    if (!supported || element == null || event.propertyName != "src") return;

    var src = element.src;

    // if not set to blank
    if (!new RegExp(blankSrc).test(src))
        fixImage(element);
};

function fixImage() {
    var element = document.getElementById("captcha_image");

    if (!supported || element == null) return;

    element.attachEvent("onpropertychange", propertyChanged);

    var src = element.src;

    // check for real change
    if (src == realSrc && /\.png$/i.test(src)) {
        element.src = blankSrc;
        return;
    }

    if (!new RegExp(blankSrc).test(src)) {
        // backup old src
        realSrc = src;
    }

    // test for png
    if (/\.png$/i.test(realSrc)) {
        // set blank image
        element.src = blankSrc;
        // set filter
        element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft." +
					"AlphaImageLoader(src='" + src + "',sizingMethod='scale')";
    }
    else {
        // remove filter
        element.runtimeStyle.filter = "";
    }
}