/************************************************************************************
  Script to move images in responce to different effects
  
  Developer: Dima V. Fedorov <www.dimin.net>
  Copyright (C) VRL, UCSB <http://vision.ece.ucsb.edu>
  
  History:
    03/31/2006 1:26 - First creation
	
************************************************************************************/

	var imageObj;
  var itop=0, ileft=0;
  var mousePressed=false;
  var x=0,y=0,ix=0,iy=0;
	
	function movemouse(e)
	{
		if (!mousePressed) return true;
		if (!e) e = window.event;
		nx = e.clientX;	
		ny = e.clientY;		
		x = x+nx-ix; y = y+ny-iy;			
		imageObj.style.top = y+'px';
		imageObj.style.left = x+'px';
		ix=nx; iy=ny;		
		return false;
	}

	function mousedown(e)
	{
		mousePressed = false;
	
		var fobj = null;
		if (!e) fobj = event.srcElement; else fobj = e.target;		
		if (fobj.className != "personphoto") return;

		if (!e) e = window.event;
		ix = e.clientX;	
		iy = e.clientY;		
		mousePressed = true;	
	}

	function mouseup(e)
	{
		mousePressed = false;
	}

	function doscroll(e)
	{
		dy = 0;
		if (window.pageYOffset) dy = window.pageYOffset;
		else
		if (document.documentElement.scrollTop) dy = document.documentElement.scrollTop;
		else
		if (document.body.scrollTop) dy = document.body.scrollTop;
		
		if (dy > itop) 
		  { imageObj.style.top = (dy+20)+'px'; y = dy+20; }
		else
		  { imageObj.style.top = itop+'px'; y = itop; }	
	}