图片根据鼠标轨迹移动效果

1、新建html文档。

2、准备好需要用到的图标。

3、书写hmtl代艨位雅剖码。<input type="button" value=&鳎溻趄酃quot;根据鼠标点击位置移动" /><input type="button" value="根据标鼠标轨迹移动" /><p>请点击按钮激活功能！</p><div></div>

4、书写css代码。body, div { margin: 0; padding: 0; }div { position: absolute; width: 66px; height: 45px; background: url(../images/pic.gif) no-repeat; top: 100px; left: 50px; }p, input { margin: 10px; }

5、书写并添加js代码。<script>window.onload = function (){ var oDiv = document.getElements蚱澄堆别ByTagName("div")[0]; var aInput = document.getElementsByTagName("input"); var oP = document.getElementsByTagName("p")[0]; var i = 0; aInput[0].onclick = function (event) { (event || window.event).cancelBubble = true; clearEvent(); this.value += "(已激活)"; oP.innerHTML = "鼠标点击页面， 人物将移动至鼠标位置！"; document.onclick = function (event) { var event = event || window.event; oDiv.style.background = "url(images/pic2.gif) no-repeat"; startMove(oDiv, {x:event.clientX, y:event.clientY}, function(){oDiv.style.background = "url(images/pic2.gif) no-repeat"}); return false; } }; aInput[1].onclick = function (event) { (event || window.event).cancelBubble = true; clearEvent(); this.value += "(已激活)"; oP.innerHTML = "按住鼠标左键，在页面划动，人物将按照鼠标轨迹移动。" var aPos = [{x:oDiv.offsetLeft, y:oDiv.offsetTop}]; document.onmousedown = function (event) { var event = event || window.event; aPos.push({x:event.clientX, y:event.clientY}); document.onmousemove = function (event) { var event = event || window.event; aPos.push({x:event.clientX, y:event.clientY}); return false; } return false; } document.onmouseup = function () { document.onmousemove = null; oDiv.style.background = "url(images/pic2.gif) no-repeat"; var timer = setInterval(function () { if(aPos.length == 0) { clearInterval(timer); oDiv.style.background = "url(images/pic.gif) no-repeat"; return; }; oDiv.style.left = aPos[0].x + "px"; oDiv.style.top = aPos[0].y + "px"; aPos.shift(); }, 30); }; } function clearEvent() { document.onclick = null; document.onmousedown = null; document.onmousemove = null; document.onmouseup = null; for (i = 0; i < aInput.length; i++) { aInput[i].value = aInput[i].value.replace("(已激活)", ""); aInput[i].onmousedown = aInput[i].onmouseup = function (event) { (event || window.event).cancelBubble = true; }; } }};function startMove(obj, oTarget, fnEnd){ clearInterval(obj.timer); obj.timer = setInterval(function () { doMove(obj, oTarget, fnEnd) }, 30)}function doMove(obj, oTarget, fnEnd){ var iX = (oTarget.x - obj.offsetLeft) / 5; var iY = (oTarget.y - obj.offsetTop) / 5; iX = iX > 0 ? Math.ceil(iX) : Math.floor(iX); iY = iY > 0 ? Math.ceil(iY) : Math.floor(iY); if (oTarget.x == obj.offsetLeft && oTarget.y == obj.offsetTop) { clearInterval(obj.timer); fnEnd && fnEnd(); } else { obj.style.left = obj.offsetLeft + iX + "px"; obj.style.top = obj.offsetTop + iY + "px"; }}</script>

6、代码整体结构。

7、查看效果。