var ie				= document.all;
var ns6				= document.getElementById && !document.all;

var	event_lastxx, event_lastyy;

function ietruebody( ) {
	return (document.compatMode && document.compatMode!='BackCompat' && !window.opera) ? 
		document.documentElement : document.body;
}

function show_cover( event, url ) {
var	x_off	= 12;
var	y_off	= 12;

	if( url == false ) {
		document.getElementById('coverimagediv').style.display = 'none';
		document.coverimage.src='';
	}
	else {
		var xx, yy;
 		if( typeof(event) == 'object' ) {
			var event = event ? event : window.event ? window.event : null;
			if( !event ) return;
  			if( event.pageX ) {
   				xx=event.pageX;
   				yy=event.pageY;
  			} else {
   				xx = ns6 ? event.clientX : ietruebody().scrollLeft + event.clientX;
   				yy = ns6 ? event.clientY : ietruebody().scrollTop + event.clientY;
  			}
 		} else {
  			xx=event_lastxx; yy=event_lastyy;
 		}
 		event_lastxx=xx; event_lastyy=yy;
		
		document.coverimage.src=url;
		if (ns6) {
			document.getElementById('coverimagediv').style.left = (parseInt(xx/x_off) + 1) * x_off + 'px';
			document.getElementById('coverimagediv').style.top = yy + y_off + 'px';
		} 
		else {
			document.getElementById('coverimagediv').style.pixelLeft = xx + x_off;
			document.getElementById('coverimagediv').style.pixelTop = yy + y_off;
		}
		
		document.getElementById('coverimagediv').style.display = '';
	}
}