跟随页面上下浮动的客服代码特效

NS6 = (document.getElementById && !document.all) IE = (document.all) NS = (navigator.appName=="Netscape" && navigator.appVersion.charAt(0)=="4") tempBar='';barBuilt=0;ssmItems=new Array(); moving=setTimeout('null',1) function moveOut() { if ((NS6||NS) && parseInt(ssm.left)(-menuWidth)) { clearTimeout(moving);moving = setTimeout('moveBack1()', slideSpeed);slideMenu(-10)} else {clearTimeout(moving);moving=setTimeout('null',1)}} function slideMenu(num){ if (IE) {ssm.pixelLeft += num;} if (NS||NS6) {ssm.left = parseInt(ssm.left)+num;} if (NS) {bssm.clip.right+=num;bssm2.clip.right+=num;}} function makeStatic() { if (NS||NS6) {winY = window.pageYOffset;} if (IE) {winY = document.documentElement.scrollTop+300;} if (NS6||IE||NS) { if (winY!=lastY && winY>YOffset-staticYOffset) { smooth = .2 * (winY - lastY - YOffset + staticYOffset);} else if (YOffset-staticYOffset+lastY>YOffset-staticYOffset) { smooth = .2 * (winY - lastY - (YOffset-winY)));} else {smooth=0} if(smooth > 0) smooth = Math.ceil(smooth); else smooth = Math.floor(smooth); if (IE) bssm.pixelTop+=smooth; if (NS6||NS) bssm.top=parseInt(bssm.top)+smooth lastY = lastY+smooth; setTimeout('makeStatic()', 1)}} function buildBar() { if(barText.indexOf('