javascript - Scroll Automation Wont Stop on Last Link -


i have javascript function that's not quite working properly. works brilliantly links except last. when link triggered scrolls bottom , doesn't allow scroll up...despite best efforts.

maybe approach wrong.

here markup:

  <nav>     <ul>        <li>         <a id="home" href="#" onclick="return false">home</a>       </li>        <li>         <a id="services" href="#" onclick="return false">services</a>       </li>        <li>         <a id="portfoliolink" href="#" onclick="return false">portfolio</a>       </li>        <li>         <a id="contactlink" href="#" onclick="return false">contact</a>       </li>      </ul>    </nav>

and javascript:

function smoothscroll(){   if (window.addeventlistener){     document.getelementbyid('home').addeventlistener("click", scrolltohome, false);     document.getelementbyid('services').addeventlistener("click", scrolltoservices, false);     document.getelementbyid('portfoliolink').addeventlistener("click", scrolltoportfolio, false);     document.getelementbyid('contactlink').addeventlistener("click", scrolltocontact, false);   } };  function scrolltohome(){   var scrolly = 0;   var distance = 40;   var speed = 24;   var currenty = window.pageyoffset;    var targety = document.getelementbyid('chris-misterek').offsettop;   var bodyheight = document.body.offsetheight;   var ypos = currenty + window.innerheight;   var animator = settimeout('scrolltohome("chris-misterek")',24);    if(currenty < targety-distance){       scrolly = currenty+distance;       window.scroll(0, scrolly);     }   else {       cleartimeout(animator);     } };  function scrolltoservices(){   var scrolly = 0;   var distance = 10;   var currenty = window.pageyoffset;    var targety = document.getelementbyid('what-we-do').offsettop;   var bodyheight = document.body.offsetheight;   var ypos = currenty + window.innerheight;   var animator = settimeout('scrolltoservices("what-we-do")',4);    if(currenty < targety-distance){       scrolly = currenty+distance;       window.scroll(0, scrolly);     }   else {       cleartimeout(animator);     } };  function scrolltoportfolio(){   var scrolly = 0;   var distance = 10;   var currenty = window.pageyoffset;    var targety = document.getelementbyid('portfolio').offsettop;   var bodyheight = document.body.offsetheight;   var ypos = currenty + window.innerheight;   var animator = settimeout('scrolltoportfolio("portfolio")',4);    if(currenty < targety-distance){       scrolly = currenty+distance;       window.scroll(0, scrolly);     }   else {       cleartimeout(animator);     } };  var scrolly = 0; var distance = 40; var speed = 24;  function scrolltocontact() {     var currenty = window.pageyoffset;     var targety = document.getelementbyid('contact').offsettop;     var bodyheight = document.body.offsetheight;     var ypos = currenty + window.innerheight;     var animator = settimeout('scrolltocontact("contact")',24);     if(ypos > bodyheight){         cleartimeout(animator);     } else {         if(currenty < targety-distance){             scrolly = currenty+distance;             window.scroll(0, scrolly);         } else {             cleartimeout(animator);         }     } };  window.onload = smoothscroll;

figured out needed add greater equal if(ypos > bodyheight) statement correct code looks this:

function scrolltocontact() {     var currenty = window.pageyoffset;     var targety = document.getelementbyid('contact').offsettop;     var bodyheight = document.body.offsetheight;     var ypos = currenty + window.innerheight;     var animator = settimeout('scrolltocontact("contact")',24);     if(ypos >= bodyheight){         cleartimeout(animator);     } else {         if(currenty < targety-distance){             scrolly = currenty+distance;             window.scroll(0, scrolly);         } else {             cleartimeout(animator);         }     } };

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