我正在用HTML,CSS,JS和PHP编写一个简单的棋盘。我想为偶数和奇数方块以及自定义尺寸(高度和宽度)添加自定义颜色。我想这样做,但它不起作用。这是我即将到来的考试的任务,所以任何帮助将不胜感激。先感谢您。
<html>
<body>
Select first color:
<select id="mySelect" onChange="changeColor(value);">
<option value="black">Black</option>
<option value="blue">Blue</option>
<option value="yellow">Yellow</option>
<option value="orange">Orange</option>
</select>
<br><br>
Select second color:
<select id="mySelect2" onChange="changeColor2(value);">
<option value="white">White</option>
<option value="brown">Brown</option>
<option value="red">Red</option>
<option value="purple">Purple</option>
</select>
<br><br>
Dimensions value:
<input type="number" id="dimensions">
<button type="button" onClick="changeDim">Hajde</button>
<table width="270px" cellspacing="0px" cellpadding="0px" border="1px">
<?php
for($row=1;$row<=8;$row++)
{
echo "<tr>";
for($col=1;$col<=8;$col++)
{
$total=$row+$col;
if($total%2==0)
{
echo "<td id='even'></td>";
}
else
{
echo "<td id='odd'></td>";
}
}
echo "</tr>";
}
?>
</table>
<script>
function changeColor(color) {
var x = document.getElementById("mySelect").selectedIndex;
document.getElementById("par").style.background = color;
}
function changeColor2(color) {
var x = document.getElementById("mySelect2").selectedIndex;
document.getElementById("par").style.background = color;
}
function changeDim() {
var px = "px";
var dimension = document.getElementById("dimensions").value + px;
document.getElementById("even").style.height = dimension;
document.getElementById("even").style.width = dimension;
document.getElementById("odd").style.height = dimension;
document.getElementById("odd").style.width = dimension;
}
</script>
</body>
</html>
答案 0 :(得分:0)
我相信你只是希望能够访问偶数或奇数方格。如果你只是改变样式,你可以用css做到这一点。
你可以在桌子上做这样的事情。因为你说它是用于国际象棋棋盘,所以它也会翻转来做行上的偶数和奇数。
td {
border: 1px solid black;
width: 50px;
height: 50px;
}
tr:nth-child(odd) td:nth-child(odd){
background-color: black;
}
tr:nth-child(even) td:nth-child(even){
background-color: black;
}
希望这会有所帮助。祝好运! 快点前https://jsfiddle.net/1c0b2ff0/5/