When learning html, what do we need to know and what little knowledge do we need to know? The editor below will introduce to you how to convert html rows to columns.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>行转列</title>
<script type="text/javascript" src="jquery-1.4.2.min.js"></script>
<script type = "text/javascript">
$(function(){
var trs = $("#table tr");
var tdLength = $("#table > tbody > tr:eq(1) > td").length;
$("#rc").html("rows:" + trs.length + "\t columns:" + tdLength);
var times = new Array();
$("#row2col").click(function(){
var begin = new Date();
var newTable = $("<table></table>").css({"border":"1px red solid"}).attr("border","1");
newTable.appendTo($("#show"));
for(var i = 0; i < tdLength; i++){
var tr = $("<tr></tr>");
trs.each(function(index){
var td = $("td:eq("+i+")",$(this));
tr.append(td.clone());
});
newTable.append(tr);
}
var end = new Date();
var totalTime = end.getTime() - begin.getTime();
times.push(totalTime);
$("#time").append( "times:"+ totalTime + "<br/>");
$("#avgTime").html(function(){
var totals = 0;
var count = times.length;
for(var i in times){
totals += times[i];
}
return "平均时间：" + (totals/count) + "mm";
});
});
});
</script>
</head>
<body>
<input type = "button" value = "row2col" id = 'row2col' />
<p id = "rc"></p>
<p id = "time" ></p>
<p id = "avgTime"></p>
<p id = 'show' >
</p>
<table border = "1" id = "table">
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
</table>
</body>
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