跟隨屏幕移動的圖像

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跟隨屏幕移動的圖像

來源：易賢網(wǎng) 閱讀：751 次日期：2014-09-09 14:42:07

溫馨提示：易賢網(wǎng)小編為您整理了“跟隨屏幕移動的圖像”,方便廣大網(wǎng)友查閱！

1、將以下代碼加入到HEML的<head></head>之間：

#floater {

position: absolute;

left: 500;

top: 146;

width: 125;

visibility: visible;

z-index: 10;

}</style>

====2、將以下代碼加入到HEML的<body></body>之間

<font color="#FF8040">圖片下面的文字</font></p>

</div><script LANGUAGE="JavaScript">

self.onError=null;

currentX = currentY = 0;

whichIt = null;

lastScrollX = 0; lastScrollY = 0;

NS = (document.layers) ? 1 : 0;

IE = (document.all) ? 1: 0;

function heartBeat() {

if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }

if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }

if(diffY != lastScrollY) {

percent = .1 * (diffY - lastScrollY);

if(percent > 0) percent = Math.ceil(percent);

else percent = Math.floor(percent);

if(IE) document.all.floater.style.pixelTop += percent;

if(NS) document.floater.top += percent;

lastScrollY = lastScrollY + percent;

}

if(diffX != lastScrollX) {

percent = .1 * (diffX - lastScrollX);

if(percent > 0) percent = Math.ceil(percent);

else percent = Math.floor(percent);

if(IE) document.all.floater.style.pixelLeft += percent;

if(NS) document.floater.left += percent;

lastScrollX = lastScrollX + percent;

}

function checkFocus(x,y) {

stalkerx = document.floater.pageX;

stalkery = document.floater.pageY;

stalkerwidth = document.floater.clip.width;

stalkerheight = document.floater.clip.height;

if( (x > stalkerx && x < (stalkerx+stalkerwidth)) && (y > stalkery && y < (stalkery+stalkerheight))) return true;

else return false;

}

function grabIt(e) {

if(IE) {

whichIt = event.srcElement;

while (whichIt.id.indexOf("floater") == -1) {

whichIt = whichIt.parentElement;

if (whichIt == null) { return true; }

}

whichIt.style.pixelLeft = whichIt.offsetLeft;

whichIt.style.pixelTop = whichIt.offsetTop;

currentX = (event.clientX + document.body.scrollLeft);

currentY = (event.clientY + document.body.scrollTop);

} else {

window.captureEvents(Event.MOUSEMOVE);

if(checkFocus (e.pageX,e.pageY)) {

whichIt = document.floater;

StalkerTouchedX = e.pageX-document.floater.pageX;

StalkerTouchedY = e.pageY-document.floater.pageY;

}

return true;

}

function moveIt(e) {

if (whichIt == null) { return false; }

if(IE) {

newX = (event.clientX + document.body.scrollLeft);

newY = (event.clientY + document.body.scrollTop);

distanceX = (newX - currentX); distanceY = (newY - currentY);

currentX = newX; currentY = newY;

whichIt.style.pixelLeft += distanceX;

whichIt.style.pixelTop += distanceY;

if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop;

if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft;

if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;

if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;

event.returnValue = false;

} else {

whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY);

if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset;

if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset;

if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;

if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;

return false;

}

return false;

}

function dropIt() {

whichIt = null;

if(NS) window.releaseEvents (Event.MOUSEMOVE);

return true;

}

if(NS) {

window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN);