软件开发培训班 >> 编程开发 >> JavaScript

javascript table美化鼠标滑动单元格变色

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    <meta http-equiv="content-type" content="text/html; charset=utf-8"> 
    <title>orbitz-like behavior for hovering over table cells</title> 
<style type="text/css"> 
.cssguycomments {background:#eee;border:#ddd;padding:8px;margin-bottom:40px;} 
.cssguycomments p {font:normal 12px/18px verdana;}

table    {border-collapse:collapse;} 
thead th { 
    font:bold 13px/18px georgia; 
    text-align:left; 
    background:#fff4c6; 
    color:#333; 
    padding:8px 16px 8px 8px; 
    border-right:1px solid #fff; 
    border-bottom:1px solid #fff; 
} 
thead th.null {background:#fff;} 
tbody th { 
    font:bold 12px/15px georgia; 
    text-align:left; 
    background:#fff9e1; 
    color:#333; 
    padding:8px; 
    border-bottom:1px solid #f3f0e4; 
    border-right:1px solid #fff; 
} 
tbody td { 
    font:normal 12px/15px georgia; 
    color:#333; 
    padding:8px; 
    border-right:1px solid #f3f0e4; 
    border-bottom:1px solid #f3f0e4; 
} 
/*  这3个是关键   --cssrain.cn */ 
tbody td.on {background:green;}    
thead th.on {background:red;} 
tbody th.on {background:red;} 
</style>

function addClassName(elm, className){ 
    var currentClass = elm.className; 
    if(!new RegExp(("(^|\\s)" + className + "(\\s|$)"), "i").test(currentClass)){ 
        elm.className = currentClass + ((currentClass.length > 0)? " " : "") + className; 
    } 
    return elm.className; 
}

function removeClassName(elm, className){ 
    var classToRemove = new RegExp(("(^|\\s)" + className + "(\\s|$)"), "i"); 
    elm.className = elm.className.replace(classToRemove, "").replace(/^\s+|\s+$/g, ""); 
    return elm.className; 
}

function makeTheTableHeadsHighlight() { 
    // get all the tds in the heart of the table... 
    var table = document.getElementById(rockartists); 
    var tbody = table.getElementsByTagName(tbody); 
    var tbodytds = table.getElementsByTagName(td); 
     
    // and loop through them... 
    for (var i=0; i<tbodytds.length; i++) { 
     
    // take note of their default class name 
        tbodytds[i].oldClassName = tbodytds[i].className; 
         
    // when someone moves their mouse over one of those cells... 
        tbodytds[i].onmouseover = function() { 
     
    // attach on to the pointed cell 
            addClassName(this,on); 
             
    // attach on to the th in the thead with the same class name 
            var topheading = getElementsByClassName(this.oldClassName,th,table); 
            addClassName(topheading[0],on); 
             
    // attach on to the far left th in the same row as this cell 
            var row = this.parentNode; 
            var rowheading = row.getElementsByTagName(th)[0]; 
            addClassName(rowheading,on); 
        } 
     
    // ok, now when someone moves their mouse away, undo everything we just did. 
     
        tbodytds[i].onmouseout = function() { 
     
    // remove on from this cell 
            removeClassName(this,on); 
             
    // remove on from the th in the thead 
            var topheading = getElementsByClassName(this.oldClassName,th,table); 
            removeClassName(topheading[0],on);

// remove on to the far left th in the same row as this cell 
            var row = this.parentNode; 
            var rowheading = row.getElementsByTagName(th)[0]; 
            removeClassName(rowheading,on); 
        } 
    } 
} 
addLoadEvent(makeTheTableHeadsHighlight); 
</script> 
</head> 
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<div class="cssguycomments"> 
<p>Final example with JavaScript applied.  Hover over a table cell to see effects.  "View Source" and copy if youd like to use.</P><br><INPUT onclick=runEx('runcode') type=button value=运行代码 /><br>
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