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public static string GetMsg(string strDescription)
{
string strScript = "<script language="javascript">";
if(strDescription != "")
{
strScript += "document.write(""+strDescription+"");";
strScript += "j=3;"+
"function popClose() {"+
" j -= 1;"+
" if (j > 0){setTimeout("popClose()",1000);}"+
" else{popmsg.style.display="none";}"+
"}";
strScript += "popClose();";
}
strScript += "</script>";
return strScript;
}

本文来源：http://www.gdgbn.com/shoujikaifa/7709/