floater.js

物业管理和办公自动化系统

	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 closeLoginForm()
	{
			floater.style.visibility = "hidden";
	}

	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);