IE/FireFox具备兼容性的拖动代码

特点： 1、兼容 IE6、FF、Opear（IE7还没有机会测试） 2、拖动流畅 3、起点与终点之间有过渡，使移动更平滑(可调) 演示 /* Author:misshjn HomePage:http://www.happyshow.org Date:2007-04-30 拖动开始 */ function _getStyle(element,styleProp){ if (element.currentStyle){ var y = element.currentStyle[styleProp]; }else if (window.getComputedStyle){ var y = document.defaultView.getComputedStyle(element,null).getPropertyValue(styleProp.replace(/([A-Z])/g,"-$1").toLowerCase()); } return y; } function _elementOnmouseDown(evt,blockID){ var obj, temp; obj=document.getElementById(blockID); var x = evt.clientX || evt.pageX; var y = evt.clientY || evt.pageY; obj.startX=x-obj.offsetLeft; obj.startY=y-obj.offsetTop; var d = document.createElement("div"); d.style.position = "absolute"; d.style.width = obj.clientWidth + parseInt(_getStyle(obj,"borderLeftWidth"),10) + parseInt(_getStyle(obj,"borderRightWidth")) -2 + "px"; d.style.height = obj.clientHeight + parseInt(_getStyle(obj,"borderTopWidth"),10) + parseInt(_getStyle(obj,"borderBottomWidth")) -2 + "px"; d.style.border = "1px dashed #666"; d.style.top = _getStyle(obj,"top"); d.style.left = _getStyle(obj,"left"); d.style.zIndex = "9999"; document.body.appendChild(d); document.onmousemove=function(evt){ d.style.left= (evt?evt.pageX:event.clientX) - obj.startX + "px"; d.style.top= (evt?evt.pageY:event.clientY) - obj.startY + "px"; }; document.onmouseup=function(){ var objL = parseInt(_getStyle(obj,"left"),10); var objT = parseInt(_getStyle(obj,"top"),10); var obj2L = parseInt(d.style.left,10); var obj2T = parseInt(d.style.top,10); var todolist = []; var level = 10; //元素移动从起点到终点之间过渡的级数,大于0的整数 var speed = 10; //毫秒，每次移动的间隔时间，数字越大，动画感越强，但跳跃感也越大 for (i=1; i<=level; i++){ todolist.push(function(t){ setTimeout(function(){ obj.style.left = objL + (obj2L-objL)*(t/level) + "px"; obj.style.top = objT + (obj2T-objT)*(t/level) + "px"; if(t==i)todolist=null; },speed*arguments[0]); }); } for (i=1; i<=level; i++){ todolist[i-1](i); } document.body.removeChild(d); document.onmousemove = null; document.onmouseup = null; }; } /* 拖动结束 */

ECMAScript可以识别两种类型的对象，一种叫做Native Object属于语言范畴;一种叫做Host Object，由运行环境提供例如document对象， Dom Node等 Native objects是一种松散的结构并且可以动态的增加属性(property)，所>>>详细阅读

本文标题：IE/FireFox具备兼容性的拖动代码

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