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厌倦了闪动的页面？来试试 javascript+WebService 吧！

摘要: 厌倦了闪动的页面？来试试 javascript+WebService 吧！

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相信大家也遇到过这样的情况，在B/S的系统中即时的发送短消息，一般的办法是定时的刷新页面，但如果你也像我一样厌倦了不停闪动的页面，不妨来试试javascript+WebService的解决方法。

//deptCode是部门编号，用来检测是否有未读信息
function MoniMsg(deptCode)
{
var deptCode = document.getElementById("DeptCode").value;

var myWebService="http://122.124.6.70/khmis/websvr/KH_Msg.asmx ";
var myMethod="http://tempuri.org/hasNewMsg";

var requestHttp=new ActiveXObject("Microsoft.XMLHTTP");

var s=""; s=s + "<?xml version =\"1.0\" encoding=\"gb2312\"?>\n"
s=s + " s=s + " xmlns:xsi=\" http://www.w3.org/2001/XMLSchema-instance\""
s=s + " xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\""
s=s + " xmlns:soap=\"\n'>http://schemas.xmlsoap.org/soap/envelope/\">\n"
s=s + " \n";

//------------写入输入参数-----------------------------------------------
s = s + " http://tempuri.org/\">\n";
s = s + " "+ deptCode +"\n";
s = s + " \n";
//-----------------------------------------------------------------------

s=s + " \n"
s=s + " "

//这里是重点哟！
requestHttp.Open("POST",myWebService,false);
requestHttp.SetRequestheader("Content-Type","text/xml;Charset=gb2312");
requestHttp.SetRequestheader("SOAPAction", myMethod);
requestHttp.Send(s);

res = requestHttp.ResponseXML;

var pos1 = res.xml.indexOf("");
var pos2 = res.xml.indexOf("");

var len = pos2 - pos1 - ("").length;

var result = res.xml.substr(pos1 + ("").length , len);

if (document.getElementById("IsHasHistoryMsg").value == "no")
{

}
else
{
if (result == "true")
{
document.getElementById("msg").innerHTML ="&nbsp;&nbsp;";
}
else
{
document.getElementById("msg").innerHTML ="";
}
}
}

//WebService的代码很简单，就是查询数据库返回一个bool值，就不在这里写了，相信大家都能明白。函数在页面里这样使用window.setTimeout("MoniMsg("+deptCode+")",5000);，说完了，要不要赶快试一下？