javascript之鼠标拖动位置互换效果代码

鼠标拖动，位置互换效果，主要用于div，提高用户体验等方面

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<body> 
<style type="text/css"> 
div.box{ 
position:relative; 
padding:5px; 
background-color:#000; 
width:300px; 
height:300px; 
overflow:hidden; 
} 
div.box div.item{ 
float:left; 
width:90px; 
height:90px; 
background-color:#ccc; 
margin:5px; 
position:relative; 
cursor:pointer; 
} 
div.mask{ 
    width:90px; 
    height:90px; 
    background-color:#f00; 
    opacity:0.8; 
    filter:progid:DXImageTransform.Microsoft.Alpha(opacity=80); 
    position:absolute; 
    visibility:hidden; 
    top:20px; 
    left:20px; 
    z-index:10; 
} 
</style> 
<script type="text/javascript"> 
var darg = { 
    target : null, 
    ox : 0, 
    oy : 0 
}; 
var box = document.createElement("div"); 
box.className = "box"; 
var mask = document.createElement("div"); 
mask.className = "mask"; 
box.appendChild(mask); 
for(var i = 0; i < 9; i ++){ 
    var item = document.createElement("div"); 
    item.className = "item"; 
    item.appendChild(document.createTextNode(i + 1)); 
    item.onmousedown = function(){ 
        var e = arguments[0] || window.event; 
        var o = e.target || e.srcElement; 
        darg.target = o; 
        mask.style["top"] = o.offsetTop + "px"; 
        mask.style["left"] = o.offsetLeft + "px"; 
        mask.style["visibility"] = "visible"; 
        darg.ox = e.clientX - mask.offsetLeft; 
        darg.oy = e.clientY - mask.offsetTop; 
    } 
    box.appendChild(item); 
} 
document.body.appendChild(box); 
function getItem(x,y){ 
    x = x - box.offsetLeft; 
    y = y - box.offsetTop; 
    var o = box.childNodes[(3 - parseInt((box.offsetWidth - x)/100) + (2 - parseInt((box.offsetHeight - y)/100)) * 3)]; 
    var n = darg.target.nextSibling; 
    var on = o.nextSibling; 
    box.insertBefore(o,n); 
    box.insertBefore(darg.target,on); 
} 
document.onmousemove = function(){ 
    if(darg.target != null && darg.target.nodeType == 1){ 
        var e = arguments[0] || window.event; 
        mask.style["left"] = e.clientX - darg.ox + "px"; 
        mask.style["top"] = e.clientY - darg.oy + "px"; 
    } 
} 
box.onmouseup = function(){ 
    if(darg.target != null && darg.target.nodeType == 1){ 
        var e = arguments[0] || window.event; 
        var o = e.target || e.srcElement; 
        getItem(e.clientX,e.clientY); 
        darg.target = null; 
    } 
}

document.onmouseup = function(){ 
    darg.target = null; 
    mask.style["visibility"] = "hidden"; 
} 
</ script> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

javascript之鼠标拖动位置互换效果代码_javascript技巧