js对象拖动

<!--

var currentMoveObj = null; //当前拖动对象

var relLeft; //鼠标按下位置相对对象位置

var relTop;

function f_mdown(obj)

{

currentMoveObj = obj; //当对象被按下时，记录该对象

currentMoveObj.style.position = "absolute";

relLeft = event.x - currentMoveObj.style.pixelLeft;

relTop = event.y - currentMoveObj.style.pixelTop;

}

window.document.onmouseup = function()

{

currentMoveObj = null; //当鼠标释放时同时释放拖动对象

}

function f_move(obj)

{

if(currentMoveObj != null)

{

currentMoveObj.style.pixelLeft=event.x-relLeft;

currentMoveObj.style.pixelTop=event.y-relTop;

}

//-->

</SCRIPT>

<BODY>

<TR>

<TD bgcolor="#CCCCCC" align="center" style="cursor:move">title1</TD>

</TR>

<TR>

<TD align="center" height="60">content</TD>

</TR>

</TABLE>

<TR>

<TD bgcolor="#CCCCCC" align="center" style="cursor:move">title2</TD>

</TR>

<TR>

<TD align="center" height="60">content</TD>

</TR>

</TABLE>

</BODY>

第二个示例

<html>

<head>

<!--

body{font-size:12px;}

a:visited{text-decoration:none;color:slategray;}

a:hover{text-decoration:underline;color:slategray;}

a:link{text-decoration:none;color:slategray;}

-->

</style>

<!--

//可以打包为js文件;

var x0=0,y0=0,x1=0,y1=0;

var offx=6,offy=6;

var moveable=false;

var hover='orange',normal='#336699';//color;

var index=10000;//z-index;

//开始拖动;

function startDrag(obj)

{

if(event.button==1)

{

//锁定标题栏;

obj.setCapture();

//定义对象;

var win = obj.parentNode;

var sha = win.nextSibling;

//记录鼠标和层位置;

x0 = event.clientX;

y0 = event.clientY;

x1 = parseInt(win.style.left);

y1 = parseInt(win.style.top);

//记录颜色;

normal = obj.style.backgroundColor;

//改变风格;

obj.style.backgroundColor = hover;

win.style.borderColor = hover;

obj.nextSibling.style.color = hover;

sha.style.left = x1 + offx;

sha.style.top = y1 + offy;

moveable = true;

}

//拖动;

function drag(obj)

{

if(moveable)

{

var win = obj.parentNode;

var sha = win.nextSibling;

win.style.left = x1 + event.clientX - x0;

win.style.top = y1 + event.clientY - y0;

sha.style.left = parseInt(win.style.left) + offx;

sha.style.top = parseInt(win.style.top) + offy;

}

//停止拖动;

function stopDrag(obj)

{

if(moveable)

{

var win = obj.parentNode;

var sha = win.nextSibling;

var msg = obj.nextSibling;

win.style.borderColor = normal;

obj.style.backgroundColor = normal;

msg.style.color = normal;

sha.style.left = obj.parentNode.style.left;

sha.style.top = obj.parentNode.style.top;

obj.releaseCapture();

moveable = false;

}

//获得焦点;

function getFocus(obj)

{

if(obj.style.zIndex!=index)

{

index = index + 2;

var idx = index;

obj.style.zIndex=idx;

obj.nextSibling.style.zIndex=idx-1;

}

//最小化;

function min(obj)

{

var win = obj.parentNode.parentNode;

var sha = win.nextSibling;

var tit = obj.parentNode;

var msg = tit.nextSibling;

var flg = msg.style.display=="none";

if(flg)

{

win.style.height = parseInt(msg.style.height) + parseInt(tit.style.height) + 2*2;

sha.style.height = win.style.height;

msg.style.display = "block";

obj.innerHTML = "0";

}

else

{

win.style.height = parseInt(tit.style.height) + 2*2;

sha.style.height = win.style.height;

obj.innerHTML = "2";

msg.style.display = "none";

}

//创建一个对象;

function xWin(id,w,h,l,t,tit,msg)

{

index = index+2;

this.id = id;

this.width = w;

this.height = h;

this.left = l;

this.top = t;

this.zIndex = index;

this.title = tit;

this.message = msg;

this.obj = null;

this.bulid = bulid;

this.bulid();

}

//初始化;

function bulid()

{

var str = ""

+ "<div id=xMsg" + this.id + " "

+ "style='"

+ "z-index:" + this.zIndex + ";"

+ "" + this.width + ";"

+ "height:" + this.height + ";"

+ "left:" + this.left + ";"

+ "top:" + this.top + ";"

+ "background-color:" + normal + ";"

+ "color:" + normal + ";"

+ "font-size:8pt;"

+ "font-family:Tahoma;"

+ "position:absolute;"

+ "cursor:default;"

+ "border:2px solid " + normal + ";"

+ "' "

+ "onmousedown='getFocus(this)'>"

+ "<div "

+ "style='"

+ "background-color:" + normal + ";"

+ "" + (this.width-2*2) + ";"

+ "height:20;"

+ "color:white;"

+ "' "

+ "onmousedown='startDrag(this)' "

+ "onmouseup='stopDrag(this)' "

+ "onmousemove='drag(this)' "

+ "ondblclick='min(this.childNodes[1])'"

+ ">"

+ "<span style='" + (this.width-2*12-4) + ";padding-left:3px;'>" + this.title + "</span>"

+ "<span style='12;border-0px;color:white;font-family:webdings;' onclick='min(this)'>0</span>"

+ "<span style='12;border-0px;color:white;font-family:webdings;' onclick='ShowHide(\""+this.id+"\",null)'>r</span>"

+ "</div>"

+ "<div style='"

+ "100%;"

+ "height:" + (this.height-20-4) + ";"

+ "background-color:white;"

+ "line-height:14px;"

+ "word-break:break-all;"

+ "padding:3px;"

+ "'>" + this.message + "</div>"

+ "</div>"

+ "<div id=xMsg" + this.id + "bg style='"

+ "" + this.width + ";"

+ "height:" + this.height + ";"

+ "top:" + this.top + ";"

+ "left:" + this.left + ";"

+ "z-index:" + (this.zIndex-1) + ";"

+ "position:absolute;"

+ "background-color:black;"

+ "filter:alpha(opacity=40);"

+ "'></div>";

document.body.insertAdjacentHTML("beforeEnd",str);

}

//显示隐藏窗口

function ShowHide(id,dis){

var bdisplay = (dis==null)?((document.getElementById("xMsg"+id).style.display=="")?"none":""):dis

document.getElementById("xMsg"+id).style.display = bdisplay;

document.getElementById("xMsg"+id+"bg").style.display = bdisplay;

}

//modify by haiwa @ 2005-7-14

//http://www.51windows.Net

//-->

</script>

<!--

function initialize()

{

var b = new xWin("2",240,200,100,100,"印章窗口","这里面是一个透明的GIF印章图");

}

window.onload = initialize;

//-->

</script>

</head>

</body>

</html>