<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>移动效果（按轨迹移动）</title><style type="text/css">body,div{margin:0;padding:0;}div{position:absolute;width:66px;height:45px;background:url(img/1.gif) no-repeat;top:100px;left:50px;}p,input{margin:10px;}</style><script type="text/javascript">window.onload = function (){ var oDiv = document.getElementsByTagName("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(img/2.gif) no-repeat"; startMove(oDiv, {x:event.clientX, y:event.clientY}, function(){oDiv.style.background = "url(img/1.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(img/2.gif) no-repeat";
var timer = setInterval(function () { if(aPos.length == 0) { clearInterval(timer); oDiv.style.background = "url(img/1.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></head><body><input type="button" value="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></body></html>
这一句跟apos之间是什么关系呢？求解答一下。
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