jquery 局部刷新 setintervel问题，貌似2个setintervel在执行？

Question

function EndRequestHandler() {
                var i=0;
                var startDate;
                var start;
$inp.bind("keypress", function (){
                    var endDate;
                    var end;
                    if(i==0)
                    {
                        startDate=new Date();
                        i=i+1;
                        start =startDate.getTime()/1000;   
                    }
                    else
                    { 
                        i=i+1;
                    } 
                 });//$inp.bind("keypress", function (e){
                 setInterval(function speed(){   //第一次运行时，显示速度很正常，局部刷新后，速度显示就不正常//了，页面上有2个速度在轮流显示，请问大侠怎样去除这情况？
                        if(i!=0)
                        {
                            var endDate;
                            var end;
                            endDate=new Date ();
                            end=endDate .getTime ()/1000;
                            var totaltime=end-start;
                            var speed=Math.round(i/totaltime*60);
                            $("#lblInfoShow").text(''+speed +'字/分钟');
                        }
                    },1000);
};
            
             function reload() {
                Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
            } ;    //局部刷新时，重新加载
            $(document).ready(function(){
        
        reload();
 });

Answer 1

 t= setInterval(function speed(){   //第一次运行时，显示速度很正常，局部刷新后，速度显示就不正常//了，页面上有2个速度在轮流显示，请问大侠怎样去除这情况？
                        if(i!=0)
                        {
                            var endDate;
                            var end;
                            endDate=new Date ();
                            end=endDate .getTime ()/1000;
                            var totaltime=end-start;
                            var speed=Math.round(i/totaltime*60);
                            $("#lblInfoShow").text(''+speed +'字/分钟');
                        }
                    },1000);
};
            
             function reload() {
                clearInterval(t);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
            } ;    //局部刷新时，重新加

Answer 2

这个问题我解决了，不过我停的是后来加载的setintervel，谢谢楼上，另外我想问下，jquery中，有没什么局部刷新后变量不变的方法，我现在把值赋给了页面隐藏的lbl来调用很不方便