用JTrackBar实现的模拟苹果风格的滚动条

代码如下:function JObj(){} JObj.$c = function(tag){return document.createElement(tag)}; JObj.$ = function(id){return document.getElementById(id)}; JObj.isRate = function(pRateString){ if(!isNaN(pRateString)) return false; if(pRateString.substr(pRateString.length-1,1) != “%”) return false