語法說明：

1.在 steps[0] = new Array(255,0,0); 中自行修改喜愛的顏色

<!--拉動捲軸變色_開始--> <script language="JavaScript"> <!-- var scrollPct, prevStep, nextStep, interStep steps = new Array(); steps[0] = new Array(255,0,0); steps[1] = new Array(255,128,0); steps[2] = new Array(255,255,0); steps[3] = new Array(0,255,0); steps[4] = new Array(0,0,255); steps[5] = new Array(128,0,255); steps[6] = new Array(255,0,255); function newColor(chan) {  var i=Math.floor(steps[prevStep][chan]+interStep*(steps[nextStep][chan]-steps[prevStep][chan]));  return i;  } function scrollFunk() { scrollPct=(steps.length-1)*document.body.scrollTop/(document.body.scrollHeight-document.body.clientHeight);  prevStep=Math.floor(scrollPct);  nextStep=Math.ceil(scrollPct);  interStep=scrollPct-prevStep;  var newRGB="rgb("+newColor(0)+","+newColor(1)+","+newColor(2)+")";  var invRGB="rgb("+(255-newColor(0))+","+(255-newColor(1))+","+(255-newColor(2))+")";  if (document.body.style.scrollbarTrackColor != null) {   document.body.style.scrollbarFaceColor=newRGB;   document.body.style.scrollbarTrackColor=invRGB;   }  } window.onscroll=scrollFunk; --> </script> <!--拉動捲軸變色_結束-->