本文介绍如何使用JavaScript实现网页表格的左侧栏位锁定功能。通过动态生成HTML结构，将表格分为固定列区域、可滚动数据区域和滚动条区域。利用JavaScript监听滚动事件，同步各区域的垂直滚动位置，确保用户在浏览长表格时，左侧关键信息始终可见。代码包含详细的数据定义、样式设置及交互逻辑，适用于需要展示大量数据且需保持上下文可见性的场景。
JavaScript实现表格左侧栏位锁定与滚动同步
<!DOCTYPE html><html><head><title>锁定表格栏位范例网页</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">body {
font: 12px 细明体; cursor: default
}
}td {
font: 12px 细明体; cursor: default
}
}.title {
border-right: #555 1px solid; padding-right: 4px; border-top: #fff 1px solid; padding-left: 4px; background: #ccc; padding-bottom: 4px; overflow: hidden; border-left: #fff 1px solid; cursor: hand; padding-top: 4px; border-bottom: #555 1px solid; white-space: nowrap
}
}.cdata {
border-right: #ddd 1px solid; padding-right: 3px; border-top: #fff 1px solid; padding-left: 3px; background: #fff; padding-bottom: 3px; overflow: hidden; border-left: #fff 1px solid; padding-top: 3px; border-bottom: #ddd 1px solid; white-space: nowrap
}
</style>
<script language="JavaScript">
// 栏位标题 ( 栏位名称 # 栏位宽度 # 资料对齐 )
var DataTitles=new Array(
"歌手 / 团体#90 #left" ,
"专辑名称 #130#left" ,
"发行公司 #110#left" ,
"本周排名 #58 #center",
"排名状况 #58 #center",
"上周排名 #58 #center",
"上榜周数 #58 #center",
"最高名次 #58 #center",
"销售百分比 #70 #center")
// 栏位资料 ( 二维阵列 )
var DataFields=new Array()
DataFields[0] =new Array("萧亚轩" ,"爱的主打歌-吻" ,"维京 Virgin" ,"1" ,"持平" ,"1" ,"2","1" ,"2.9 %")
DataFields[1] =new Array("张惠妹" ,"发烧" ,"华纳 Warner" ,"2" ,"持平" ,"2" ,"2","2" ,"2.1 %")
DataFields[2] =new Array("陶吉吉" ,"黑色柳丁" ,"全员集合 Shock" ,"3" ,"持平" ,"3" ,"5","1" ,"1.8 %")
DataFields[3] =new Array("S.H.E" ,"美丽新世界" ,"华研 HIM" ,"4" ,"持平" ,"4" ,"6","1" ,"1.2 %")
DataFields[4] =new Array("艾薇儿" ,"展翅高飞" ,"博德曼 BMG" ,"5" ,"新进榜","-" ,"1","5" ,"1.1 %")
DataFields[5] =new Array("任贤齐" ,"一个任贤齐" ,"滚石 Rock" ,"6" ,"新进榜","-" ,"1","6" ,"1.0 %")
DataFields[6] =new Array("范逸臣" ,"范逸臣第一张专辑","丰华 Forward" ,"7" ,"持平" ,"7" ,"2","7" ,"0.9 %")
DataFields[7] =new Array("谢霆锋" ,"无形的他全精选" ,"新力 Sony" ,"8" ,"下跌" ,"6" ,"4","4" ,"0.9 %")
DataFields[8] =new Array("周蕙" ,"寂寞城市" ,"福茂 Decca" ,"9" ,"下跌" ,"5" ,"3","5" ,"0.8 %")
DataFields[9] =new Array("周杰伦" ,"八度空间" ,"博德曼 BMG" ,"10","下跌" ,"8" ,"8","1" ,"0.8 %")
DataFields[10]=new Array("酷玩乐团","玩过头" ,"科艺百代 EMI" ,"11","上升" ,"16","2","11","0.7 %")
DataFields[11]=new Array("张震岳" ,"等我有一天" ,"魔岩 Magicstone","12","新进榜","-" ,"1","12","0.6 %")
DataFields[12]=new Array("堂本刚" ,"红与蓝" ,"艾回 Avex" ,"13","新进榜","-" ,"1","13","0.6 %")
DataFields[13]=new Array("ENERGY" ,"COME ON" ,"环球 Universal" ,"14","下跌" ,"10","9","5" ,"0.6 %")
DataFields[14]=new Array("陈冠希" ,"TRANSITION" ,"艾回 Avex" ,"15","下跌" ,"9" ,"3","5" ,"0.4 %")
DataFields[15]=new Array("合辑" ,"MTV 嘻哈大师" ,"环球 Universal" ,"16","下跌" ,"12","3","12","0.4 %")
</script>
<script language="JavaScript">
var BoxWidth = 480 // 资料表显示宽度 ( 不含卷轴 )
var ShowLine = 10 // 资料表显示列数
var RsHeight = 21 // 资料列高度
var LockCols = 1 // 要锁定的栏位数 ( 由左至右 )
function WriteTable(){ // 写入表格
var iBoxWidth=BoxWidth
var NewHTML="<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>\"
<td><div style=\"width:100%;overflow-x:scroll\">\"
<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>"
for(i=0;i<DataTitles.length;i++){
if(i<LockCols){
var cTitle=DataTitles[i].split("#")
iBoxWidth-=cTitle[1]
var DynTip=((i+1)==LockCols)?"解除锁定":"锁定此栏位"
NewHTML+="<td><div class=\"title\" style=\"width:"+cTitle[1]+"px;height:"+RsHeight+"px\" title=\""+DynTip+"\" onclick=\"ResetTable("+i+")\">"+cTitle[0]+"</div></td>"
}
}
NewHTML+="</tr>\"
<tr><td colspan=\""+LockCols+"\">\"
<div id=\"DataFrame1\" style=\"position:relative;width:100%;overflow:hidden\">\"
<div id=\"DataGroup1\" style=\"position:relative\"></div></div>\"
</td></tr></table></div></td>\"
<td valign=\"top\"><div style=\"width:"+iBoxWidth+"px;overflow-x:scroll\">\"
<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>"
for(i=0;i<DataTitles.length;i++){
if(i>=LockCols){
var cTitle=DataTitles[i].split("#")
NewHTML+="<td><div class=\"title\" style=\"width:"+cTitle[1]+"px;height:"+RsHeight+"px\" title=\"锁定此栏位\" onclick=\"ResetTable("+i+")\">"+cTitle[0]+"</div></td>"
}
}
NewHTML+="</tr>\"
<tr><td colspan=\""+(DataTitles.length-LockCols)+"\">\"
<div id=\"DataFrame2\" style=\"position:relative;width:100%;overflow:hidden\">\"
<div id=\"DataGroup2\" style=\"position:relative\"></div>\"
</div></td></tr></table>\"
</div></td><td valign=\"top\">\"
<div id=\"DataFrame3\" style=\"position:relative;background:#000;overflow-y:scroll\" onscroll=\"SYNC_Roll()\">\"
<div id=\"DataGroup3\" style=\"position:relative;width:1px;visibility:hidden\"></div>\"
</div></td></tr></table>"
DataTable.innerHTML=NewHTML
ApplyData()
}
function ApplyData(){ // 写入资料
var NewHTML="<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">"
for(i=0;i<DataFields.length;i++){
NewHTML+="<tr>"
for(j=0;j<DataTitles.length;j++){
if(j<LockCols){
var cTitle=DataTitles[j].split("#")
NewHTML+="<td><div class=\"cdata\" style=\"width:"+cTitle[1]+"px;height:"+RsHeight+"px;text-align:"+cTitle[2]+"\">"+DataFields[i][j]+"</div></td>"
}
}
NewHTML+="</tr>"
}
NewHTML+="</table>"
DataGroup1.innerHTML=NewHTML
var NewHTML="<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">"
for(i=0;i<DataFields.length;i++){
NewHTML+="<tr>"
for(j=0;j<DataTitles.length;j++){
if(j>=LockCols){
var cTitle=DataTitles[j].split("#")
NewHTML+="<td><div class=\"cdata\" style=\"width:"+cTitle[1]+"px;height:"+RsHeight+"px;text-align:"+cTitle[2]+"\">"+DataFields[i][j]+"</div></td>"
}
}
NewHTML+="</tr>"
}
NewHTML+="</table>"
DataGroup2.innerHTML=NewHTML
DataFrame1.style.pixelHeight=RsHeight*ShowLine
DataFrame2.style.pixelHeight=RsHeight*ShowLine
DataFrame3.style.pixelHeight=RsHeight*ShowLine+RsHeight
DataGroup3.style.pixelHeight=RsHeight*(DataFields.length+1)
}
function ResetTable(n){
var iBoxWidth=0
for(i=0;i<DataTitles.length;i++){
if(i<(n+1)){
var cTitle=DataTitles[i].split("#")
iBoxWidth+=parseInt(cTitle[1])
}
}
if(iBoxWidth>BoxWidth){
var Sure=confirm("\n锁定栏位的宽度大於资料表显示的宽 \n\n度，这可能会造成版面显示不正常。\n\n\n您确定要继续吗？")
}else{
Sure=true
}
if(Sure){
LockCols=(LockCols==n+1)?0:n+1
WriteTable()
}
}
function SYNC_Roll(){
DataGroup1.style.posTop=-DataFrame3.scrollTop
DataGroup2.style.posTop=-DataFrame3.scrollTop
}
window.onload=WriteTable
</script>
<meta content="MSHTML 6.00.2800.1170" name=GENERATOR></head>
<body>
<center>
<h4>锁定表格栏位范例网页</h4><!--// 资料表 ( 开始 ) //-->
<table cellSpacing=0 cellPadding=0 border=0>
<tbody>
<tr>
<td
style="BORDER-RIGHT: white 2px inset; BORDER-TOP: white 2px inset; BORDER-LEFT: white 2px inset; BORDER-BOTTOM: white 2px inset; BACKGROUND-COLOR: scrollbar">
<div id=DataTable></div></td></tr></tbody></table><!--// 资料表 ( 结束 ) //-->
<p>点取栏位标题可重新设定或解除目前的锁定状态</p></center></body></html>