javascript - Confused with set timeout -

i'm confused how these work...the timeout not seem keep running calls begin_anim once , thats it....

so hoping can see went wrong , explain how implement this?

this code:

//test data: //type = 'up'; //div = document.getelementbyid('theid'); //marginl = -400;  function timeout_begin(type,div,marginl){        settimeout(begin_anim(type,div,marginl),1000); }  function begin_anim(type,div,marginl){     if(type == 'up'){         if(marginl >= '-200'){                  if(marginl > '-200'){                      div.style.marginleft = '-200px';                 }             return false;         }     marginl += 2;     div.style.marginleft = marginl+'px';       }     return false; } 

hope can help!

you're looking setinterval!

also, it's better pass actual function in, , can hold reference loop can stop running later if want to:

var animationloop = setinterval(function () {        begin_anim(type, div, marginl);     }, 1000);  clearinterval(animationloop); // stop loop.