A brief discussion on the setInterval event of js_Basic knowledge-JS Tutorial-php.cn

A brief discussion on the setInterval event of js_Basic knowledge

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Release： 2016-05-16 16:28:51

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The setInterval() method will keep calling the function until clearInterval() is called or the window is closed. The ID value returned by setInterval() can be used as an argument to the clearInterval() method.
setinterval() usage

setInterval(code,millisec[,"lang"])

The following two parameters code is your js code, millisec is the time interval, measured in milliseconds

Copy code The code is as follows:

                                                                                       
            var one=document.getElementById('one')

        var x=0;

          var y=0;

        var xs=10;

          var ys=10;

           function scroll(){

                 x =xs;

            y =ys;

If(x>=document.getElementById('content').offsetWidth-one.offsetWidth-20 || x<=0)

                                        {

                        xs=-1*xs;

              }

If(y>=document.getElementById('content').offsetHeight-one.offsetHeight-20 || y<=0)

                                        {

                   ys=-1*ys;

              }

                one.style.left=x;

              one.style.top=y;

          }

          dt=setInterval(scroll,100);

           one.onmouseover=function(){

                                                                                 ,,,,,,,,,,,,,,,,,,,,,,,,,,,
           };

           one.onmouseout=function(){

          dt=setInterval(scroll,100);

           };

Here’s a simple example.

Example 1

Copy code The code is as follows: function show(){ trace("I will show it every second");}

var sh;sh=setInterval(show,1000);

clearInterval(sh);

Example 2

Copy code The code is as follows: