function changeIMG(_id,_imgsource)
{
	var e = document.getElementById(_id);
	if(e)
	{
		e.src = _imgsource;
	}
}

function popup_window(_url,_id,_width,_height)
{
	var win_x = (screen.width-_width)/2;
	var win_y = (screen.height-_height)/2;
	var wPARAM = '';
	wPARAM += 'left='+win_x+',top='+win_y+',width='+_width+',height='+_height;
	wPARAM += ',location=0,resizable=0,titlebar=0,directories=0,toolbar=0,menubar=0,scrollbars=1,status=no';
	var pw = window.open(_url,_id,wPARAM);
}

// <a href="javascript:window.close()">