鼠標左右拖動圖片，JS已限制不能垂直拖動

2024-09-05 12:22:19

字體：大中小

來源：轉載

供稿：網友

Js鼠標特效，限制一張圖片只允許在水平方向上被拖動，垂直方向已被禁止，你試下就明白了，即使上下拖動圖片，圖片也只會感受左右受力的方向改變。

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><title>可以左右拖動的圖片</title></head><body><STYLE type=text/css>#floater {LEFT: 445px; POSITION: absolute; TOP: -3px; VISIBILITY: visible; WIDTH: 125px; Z-INDEX: 10}</STYLE><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);		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><DIV align=center id=floater> <TABLE height=10 width=24>  <TBODY>   <TR>    <TD align=middle height=6 vAlign=center width=76>      <img src="/d/file/p/2024/09-05/c04a67873676a9fe42b971c743a432bf.jpg" width="170" height="113"  border=0 style="cursor:pointer">    </TD>   </TR>  </TBODY> </TABLE></DIV></body></html>

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