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setInterval(
function ()
{
var png_asp = "get_png.asp";//pngµÄaspÎļþ
png_asp += "?t=" + Math.random();//¼ÓÉÏʱ¼ä²Å¿ÉÒÔÿ´ÎÏÂÔØÐµÄ.
document.getElementById("png_img").src = png_asp;
}
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// --></mce:script>
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