var nav=navigator.appName;
var ver=parseInt(navigator.appVersion);

//mouseOver normal simple
function mouseOver(img_name,img_src) {
if (((nav == "Netscape") && (ver >= 3)) || ((nav == "Microsoft Internet Explorer") && (ver > 3))) 
	{
	document[img_name].src=img_src;	
	}	
}

//mouseOverDouble
function mouseOverDouble(img_name01,img_src01,img_name02,img_src02) {
if (((nav == "Netscape") && (ver >= 3)) || ((nav == "Microsoft Internet Explorer") && (ver > 3))) 
	{
	document[img_name01].src=img_src01;	
	document[img_name02].src=img_src02;
	}	
}

//display message in the Status Bar
function windowStatus(strMessage) {
	window.status = strMessage;
}
	
function windowStatusOff() {
	window.status = "";
	return true;
}

var strTop = 'Go back to the top of this page'
var strBack = 'Go back to the previous page'
	
//function show and hide
//good ONLY for MSIE 4 and up
ie4 = ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 ));
function showHide( targetId ){
  if (ie4){
  		target = document.all( targetId );
  			if (target.style.display == "none"){
  				target.style.display = "";
  			} 
			else {
  				target.style.display = "none";
  			}
  	}
}