function help_box(helpfile) {
	var picHeight,
		winWidth =  520,
    winHeight = 140,
		winX,
		winY;
	winX = ((window.screen.width)/2)-winWidth/2;
	winY = ((window.screen.height)/2)-winHeight/2;	
	var newWindow = window.open(helpfile,"","width=" + winWidth + ",height=" + winHeight + ",screenX=" + winX + ",screenY=" + winY + ",left=" + winX + ",top=" + winY)
}