CSS,JavaScript和MooTools制作斑马纹表格

简单的斑马纹表格，如果页面上有大量的表格数据时，隔行变色的斑马纹会帮助我们快速阅读，有利于用户体验。我们今天不讨论在动态语言中的方法，只讨论CSS，JavaScript，MooTools 是如何实现的，并有三种可行性方案。

我们的表格

The Html Code:

<table id="playlist" cellspacing="0">
	<tbody>
		<tr>
			<td>1</td>
			<td>Lost In The Plot</td>
			<td>The Dears</td>
		</tr>
		<tr>
			<td>2</td>
			<td>Poison</td>
			<td>The Constantines</td>
		</tr>
		<tr>
			<td>3</td>
			<td>Plea From A Cat Named Virtute</td>
			<td>The Weakerthans</td>
		</tr>
		<tr>
			<td>4</td>
			<td>Melissa Louise</td>
			<td>Chixdiggit!</td>
		</tr>
 
		<tr>
			<td>5</td>
			<td>Living Room</td>
			<td>Tegan And Sara</td>
 
		</tr>
		<tr>
			<td>6</td>
			<td>Speed</td>
			<td>Bran Van 3000</td>
		</tr>
		<tr>
			<td>7</td>
			<td>Fast Money Blessing</td>
			<td>King Cobb Steelie</td>
		</tr>
 
		<tr>
			<td>8</td>
			<td>Sore</td>
			<td>Buck 65</td>
		</tr>
		<tr>
			<td>9</td>
			<td>Love Travel</td>
			<td>Danko Jones</td>
		</tr>
		<tr>
			<td>10</td>
			<td>You Never Let Me Down</td>
			<td>Furnaceface</td>
		</tr>	
	</tbody>
 
</table>

我们上面所看到的表格，就是我们要美化的表格，要实现斑马纹的表格。

方案一 :

在CSS3中有许多的伪类选择器，其中的

E:nth-child(n) ： {attribute}

它可以匹配父元素中的第n个子元素E。

The CSS3 Code

/*获得奇偶数的子元素*/
tr:nth-child(odd)		{ background-color:#eee; }//所有奇数序子元素
tr:nth-child(even)		{ background-color:#fff; }//所有偶数序子元素
/*同上一样的作用*/
tr:nth-child(2n){background-color:#eee;} //返回偶数序的子元素
tr:nth-child(2n+1){ background-color:#fff;} //返回奇数序的子元素

方案二 :

The JavaScript Code

// this function is need to work around
// a bug in IE related to element attributes
function hasClass(obj) {
     var result = false;
     if (obj.getAttributeNode("class") != null) {
         result = obj.getAttributeNode("class").value;
     }
     return result;
}

function stripe(id) {

    // the flag we'll use to keep track of
    // whether the current row is odd or even
    var even = false;

    // if arguments are provided to specify the colours
    // of the even & odd rows, then use the them;
    // otherwise use the following defaults:
    var evenColor = arguments[1] ? arguments[1] : "#fff";
    var oddColor = arguments[2] ? arguments[2] : "#eee";

    // obtain a reference to the desired table
    // if no such table exists, abort
    var table = document.getElementById(id);
    if (! table) { return; }

    // by definition, tables can have more than one tbody
    // element, so we'll have to get the list of child
    // <tbody>s
    var tbodies = table.getElementsByTagName("tbody");

    // and iterate through them...
    for (var h = 0; h < tbodies.length; h++) {

     // find all the <tr> elements...
      var trs = tbodies[h].getElementsByTagName("tr");

      // ... and iterate through them
      for (var i = 0; i < trs.length; i++) {

    // avoid rows that have a class attribute
        // or backgroundColor style
    if (!hasClass(trs[i]) && ! trs[i].style.backgroundColor) {

         // get all the cells in this row...
          var tds = trs[i].getElementsByTagName("td");

          // and iterate through them...
          for (var j = 0; j < tds.length; j++) {

            var mytd = tds[j];

            // avoid cells that have a class attribute
            // or backgroundColor style
        if (! hasClass(mytd) && ! mytd.style.backgroundColor) {

      mytd.style.backgroundColor = even ? evenColor : oddColor;

            }
          }
        }
        // flip from odd to even, or vice-versa
        even = ! even;
      }
    }
}
window.onload=function(){stripe('playlist', '#fff', '#eee');}

在以前MooTools1.1的老版本中是不支持CSS3选择器的，那又如何实现那。

方案三 :

The CSS Code:

.odd{
	background:#fff;
	color: #666;
}
.even{
	background-color: #3d80df;
	color: #FFF;	
}

The MooTools JavaScript：

window.addEvent('domready', function() {
	var count = 0;
	$('table.shade-table tr').each(function(el) {
		el.addClass(count++ % 2 == 0 ? 'odd' : 'even');
	});
});

如果你已经使用了MooTools1.2+的版本，我们就可以用MooTools Selectors的伪类选择器，它的语法是类似于CSS3的伪类选择器的。

The MooTools JavaScript：

$('table#playlist tr:nth-child(odd)').addClass('odd');
 
$('table#playlist tr:nth-child(even)').addClass('even');
/*
$('table#playlist tr:nth-child(2n+1)').addClass('odd');
 
$('table#playlist tr:nth-child(2n)').addClass('even');*/

在鼠标经过时高亮表格行列

The CSS Code:

.over{
	background-color:#F00;
	color:#FFF;
}

The MooTools JavaScript:

$$("table#playlist tr").addEvent('mouseover',function() {this.addClass("over");}).addEvent('mouseout',function() {this.removeClass("over");});

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