下拉菜单网页特效，效果很不错而且符合Web标准

2024-04-27 13:59:56

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1.首先在<head>和</head>之间插入下列代码 <style type="text/<a href="http://www.vevb.com/article.asp?typeid=38">CSS</a>">#floater {position: absolute;left: 500;top: 146;width: 176;visibility: visible;z-index: 10;}--></style> 2.在body中的任意位置插入下列代码<div ID="floater" style="left: 590px; top: 158px"><img src="/img/200406301.jpg" width="127" height="150"> 欢迎光临</div><scr<a href="http://ip.vevb.com/">ip</a>t LANGUAGE="<a href="http://www.vevb.com/article.asp?typeid=160">java</a>Script">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);window.onmousedown = grabIt;window.onmousemove = moveIt;window.onmouseup = dropIt;}if(IE) {document.onmousedown = grabIt;document.onmousemove = moveIt;document.onmouseup = dropIt;}if(NS || IE) action = window.setInterval("heartBeat()",1);</script> //转载请注明出处:网页教学网。

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