JS技术

Javascript特效代码总结_Javascript教程(2)

字号+ 作者:H5之家 来源:H5之家 2015-09-27 08:02 我要评论( )

self.onError=null; currentX = currentY = 0; whichIt = null; lastScrollX = 0; lastScrollY = 0; NS = (document.layers) ? 1 : 0; IE = (document.all) ? 1: 0; function heartBeat() { if(IE) { diffY = docum


 self.onError=null;
 currentX = currentY = 0; 
 whichIt = null;          
 lastScrollX = 0; lastScrollY = 0;
 NS = (document.layers) ? 1 : 0;
 IE = (document.all) ? 1: 0;
 function heartBeat() {
  if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }
     if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
  if(diffY != lastScrollY) {
                 percent = .1 * (diffY - lastScrollY);
                 if(percent > 0) percent = Math.ceil(percent);
                 else percent = Math.floor(percent);
     if(IE) document.all.softkeyboard.style.pixelTop += percent;
     if(NS) document.softkeyboard.top += percent;
                 lastScrollY = lastScrollY + percent;}
  if(diffX != lastScrollX) {
   percent = .1 * (diffX - lastScrollX);
   if(percent > 0) percent = Math.ceil(percent);
   else percent = Math.floor(percent);
   if(IE) document.all.softkeyboard.style.pixelLeft += percent;
   if(NS) document.softkeyboard.left += percent;
   lastScrollX = lastScrollX + percent; }  }
 function checkFocus(x,y) {
         stalkerx = document.softkeyboard.pageX;
         stalkery = document.softkeyboard.pageY;
         stalkerwidth = document.softkeyboard.clip.width;
         stalkerheight = document.softkeyboard.clip.height;
         if( (x > stalkerx && x < (stalkerx+stalkerwidth)) && (y > stalkery && y < (stalkery+stalkerheight))) return true;
         else return false;}
 function grabIt(e) {
     check = false;
  if(IE) {
   whichIt = event.srcElement;
   while (whichIt.id.indexOf("softkeyboard") == -1) {
    whichIt = whichIt.parentElement;
    if (whichIt == null) { return true; } }
   whichIt.style.pixelLeft = whichIt.offsetLeft;
      whichIt.style.pixelTop = whichIt.offsetTop;
   currentX = (event.clientX + document.body.scrollLeft);
      currentY = (event.clientY + document.body.scrollTop); 
  } else {
         window.captureEvents(Event.MOUSEMOVE);
         if(checkFocus (e.pageX,e.pageY)) {
                 whichIt = document.softkeyboard;
                 StalkerTouchedX = e.pageX-document.softkeyboard.pageX;
                 StalkerTouchedY = e.pageY-document.softkeyboard.pageY;} }
     return true; }
 function moveIt(e) {
  if (whichIt == null) { return false; }
  if(IE) {
      newX = (event.clientX + document.body.scrollLeft);
      newY = (event.clientY + document.body.scrollTop);
      distanceX = (newX - currentX);    distanceY = (newY - currentY);
      currentX = newX;    currentY = newY;
      whichIt.style.pixelLeft += distanceX;
      whichIt.style.pixelTop += distanceY;
   if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop;
   if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft;
   if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;
   if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;
   event.returnValue = false;
  } else {
   whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY);
         if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset;
         if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset;
         if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;
         if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;
         return false;}
     return false; }
 function dropIt() {whichIt = null;
     if(NS) window.releaseEvents (Event.MOUSEMOVE);
     return true; }
 if(NS) {window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN);
  window.onmousedown = grabIt;
   window.onmousemove = moveIt;
  window.onmouseup = dropIt; }
 if(IE) {
  document.onmousedown = grabIt;
   document.onmousemove = moveIt;
  document.onmouseup = dropIt; }
// if(NS || IE) action = window.setInterval("heartBeat()",1);

 

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