js定时刷新

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[WebMethod]    static DateTime ntime = DateTime.Now;    public int ReturnZTByTime1(int span)    {        int ztnum;        TimeSpan ts = DateTime.Now - ntime;        if (ts.TotalSeconds % (span * 2) < span)        {            ztnum = 0;        }        else        {            ztnum = 1;        }        return ztnum;    }

JScript code

function ZT(){ var parm2 = 3;//背景刷新频率   service.useService("http://localhost/WebServiceTest1103/WebService.asmx?wsdl","ReturnZTService");   service.ReturnZTService.callService(ZTcallback,"ReturnZTByTime1",parm2); }function ZTcallback(res){        if (!res.error)          {           if(res.value==0)           {           document.getElementById('divColor1').style.background="#FF0000";            }           else           {            document.getElementById('divColor1').style.background="#000000";            }        }        else          alert("ERR");    } function SX() { ZT(); setTimeout("SX()",1000); }

HTML的代码

HTML code

<body>    <div id="service" style="behavior: url(webservice.htc)">    </div>       通过webservice的方法获得0、1值（JavaScript）    <div id="divColor1" style="border-right: black 1px solid; border-top: black 1px solid;        border-left: black 1px solid; width: 672px; border-bottom: black 1px solid; height: 245px">         <input style="width: 50px" onclick="SX()" type="button" value="开始">    </div></body>