<HTML> <HEAD> <TITLE>仿Google和Windows Live的拖拽</TITLE> <style type="text/css"> body { margin:10px; } #dragHelper { position:absolute;/*重要*/ border:2px dashed #000000; background-color:#FFFFFF; filter: alpha(opacity=30); } .normal { position:absolute;/*重要*/ width:300px; #height:10px; border:1px solid #666666; background-color:#FFFFFF; } .over { position:absolute;/*重要*/ width:300px; #height:10px; border:1px solid #666666; background-color:#f3f3f3; filter: alpha(opacity=50); } .dragArea { CURSOR: move; } </style> </HEAD> <BODY oncontextmenu="window.event.returnValue=false"> <input type="text" id="evt" name="eventValue" size="40" /> <div id="dragHelper" style="display:none"></div> <div class="normal" overClass="over" dragClass="normal"> <table width="100%"> <tbody> <tr bgcolor="#CCCCCC" bar="yes"><td><a href="#">baidu.com</a></td><td dragArea="yes" class="dragArea">........</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> <tr><td colspan="3">地址:http://www.baidu.com</td></tr> <tr><td colspan="3">关键字:</td></tr> <tr><td colspan="3">说明:</td></tr> </tbody> </table> </div> <div class="normal" overClass="over" dragClass="normal"> <table width="100%"> <tbody> <tr bgcolor="#CCCCCC" bar="yes"><td>新浪</td><td dragArea="yes" class="dragArea">........</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> <tr><td colspan="3">地址:http://www.sina.com.cn</td></tr> <tr><td colspan="3">关键字:</td></tr> <tr><td colspan="3">说明:</td></tr> </tbody> </table> </div> <div class="normal" overClass="over" dragClass="normal"> <table width="100%"> <tbody> <tr bgcolor="#CCCCCC" bar="yes"><td>源码</td><td dragArea="yes" class="dragArea">........</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> <tr><td colspan="3">地址:http://www.codefans.net</td></tr> <tr><td colspan="3">关键字:</td></tr> <tr><td colspan="3">说明:</td></tr> </tbody> </table> </div> <div class="normal" overClass="over" dragClass="normal"> <table width="100%"> <tbody> <tr bgcolor="#CCCCCC" bar="yes"><td>QQ</td><td dragArea="yes" class="dragArea">........</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> <tr><td colspan="3">地址:http://www.qq.com</td></tr> <tr><td colspan="3">关键字:</td></tr> <tr><td colspan="3">说明:</td></tr> </tbody> </table> </div> </BODY> <SCRIPT LANGUAGE="JavaScript"> <!-- var dragObjs = [];//可以拖拽的元素数组 var dragObjTops = []; var dragHelper = document.getElementById("dragHelper");//拖拽时位置框 var dragObj = null;//拖拽对象元素 var dragObjPos = 0; var dragObjOffset = {left:0,top:0};//拖拽对象原始位置 var mouseInDragObjOffset = {x:0,y:0};//鼠标在拖拽对象中的相对位置 var initHeight = 40; Number.prototype.NaN0=function(){return isNaN(this)?0:this;} function getPosition(e){//获取元素相对文档的绝对位置 var left = 0; var top = 0; while (e.offsetParent){ left += e.offsetLeft; top += e.offsetTop; e = e.offsetParent; } left += e.offsetLeft; top += e.offsetTop; return {x:left, y:top}; } function mouseCoords(ev){//获取鼠标相对文档的绝对位置 if(ev.pageX || ev.pageY){ return {x:ev.pageX, y:ev.pageY}; } return { x:ev.clientX + document.body.scrollLeft - document.body.clientLeft, y:ev.clientY + document.body.scrollTop - document.body.clientTop }; } function getMouseOffset(target, ev){//获取鼠标相对元素的相对位置 ev = ev || window.event; var elementPos = getPosition(target); var mousePos = mouseCoords(ev); return {x:mousePos.x - elementPos.x, y:mousePos.y - elementPos.y}; } function mouseDown(ev){ ev = ev || window.event; target = ev.srcElement || ev.target; if(dragObj){ return; } var dragArea = false; if(target.getAttribute("dragArea")){ dragArea = true; } while(!target.getAttribute("isDragObj")){ if(target.tagName=="HTML") break; target = target.parentNode; } if(dragArea && target.getAttribute("isDragObj")){ dragObj = target; //重写的目的是让当前对象在最上层 document.body.removeChild(dragObj); document.body.appendChild(dragObj); //记录下拖拽对象原始位置 dragObjOffset.left = dragObj.style.left; dragObjOffset.top = dragObj.style.top; dragObj.className = dragObj.getAttribute("overClass"); //鼠标在拖拽对象中的相对位置 mouseInDragObjOffset = getMouseOffset(dragObj, ev); dragHelper.style.left = dragObj.style.left; dragHelper.style.top = dragObj.style.top; dragHelper.style.width = dragObj.offsetWidth; dragHelper.style.height = dragObj.offsetHeight; dragHelper.style.display = ""; //alert(dragObj.offsetWidth+":"+dragObj.clientWidth); } } function mouseUp(ev){ ev = ev || window.event; target = ev.srcElement || ev.target; if(dragObj){ dragObj.style.left = dragHelper.style.left; dragObj.style.top = dragHelper.style.top; dragHelper.style.display = "none"; dragObj.className = dragObj.getAttribute("dragClass"); dragObj = null; } } function mouseMove(ev){ ev = ev || window.event; if(dragObj) { var mousePos = mouseCoords(ev); /*dragHelper.style.left = dragObjOffset.left; dragHelper.style.top = dragObjOffset.top; dragHelper.style.width = dragObj.offsetWidth; dragHelper.style.height = dragObj.offsetHeight; dragHelper.style.display = "";*/ var windowWidth = document.body.offsetWidth;//窗口宽度 var windowHeight = document.body.offsetHeight;//窗口高度 //拖拽对象应该所在当前位置 var dragObjLeft = mousePos.x - mouseInDragObjOffset.x; var dragObjTop = mousePos.y - mouseInDragObjOffset.y; //增加判断，不然拖拽对象拖出浏览器窗口 if(dragObjLeft >= 0 && dragObjLeft <= windowWidth - dragObj.offsetWidth - 20) dragObj.style.left = dragObjLeft; if(dragObjTop >=0) dragObj.style.top = dragObjTop; repaint(); } } //克隆对象 function cloneObject(srcObj, destObj){ destObj = srcObj.cloneNode(true); } function makeDraggable(element){ element.setAttribute("isDragObj", "y"); } function repaint(){ for(i=0; i<dragObjs.length; i++){ if(dragObjs[i] == dragObj){ dragObjPos = i; dragObjs[i] = dragHelper; break; } } if(dragObjPos>0 && parseInt(dragObj.style.top)<parseInt(dragObjs[dragObjPos-1].style.top)){ dragObjs[dragObjPos] = dragObjs[dragObjPos-1]; dragObjs[dragObjPos-1] = dragHelper; dragObjPos = dragObjPos - 1; } if(dragObjPos<dragObjs.length-1 && parseInt(dragObj.style.top)>parseInt(dragObjs[dragObjPos+1].style.top)){ dragObjs[dragObjPos] = dragObjs[dragObjPos+1]; dragObjs[dragObjPos+1] = dragHelper; dragObjPos = dragObjPos + 1; } paintDragObjs(); dragObjs[dragObjPos] = dragObj; } function paintDragObjs(){ var h = 40; for(i=0; i<dragObjs.length; i++){ dragObjs[i].style.left = 20; dragObjs[i].style.top = h; h += dragObjs[i].offsetHeight + 10; } } function openClose(obj){ obj.innerHTML = obj.innerHTML=="-"?"+":"-"; while(obj.tagName != "TBODY"){ obj = obj.parentNode; } for(i=0; i<obj.childNodes.length; i++){ if(obj.childNodes[i].nodeName == "#text" || obj.childNodes[i].getAttribute("bar")){ continue; } obj.childNodes[i].style.display=obj.childNodes[i].style.display==""?"none":""; } paintDragObjs(); } document.onmousedown = mouseDown; document.onmouseup = mouseUp; document.onmousemove = mouseMove; window.onload = function(){ var objs = document.getElementsByTagName("Div"); for(i=0; i<objs.length; i++){ var item = objs.item(i); //if(i==1)item.style.height=150; if(item.getAttribute("overClass")){ makeDraggable(item); dragObjs.push(item); item.style.left = 20; item.style.top = initHeight; dragObjTops.push(initHeight); initHeight += item.offsetHeight + 10; } } // dragHelper = document.createElement('DIV'); // dragHelper.style.cssText = 'position:absolute;display:none;'; // document.body.appendChild(dragHelper); } //--> </SCRIPT> </HTML>