but1 = new Image() ;
  but1.src = "/images/main_button1_off.gif";
  but2 = new Image() ;
  but2.src = "/images/main_button1_on.gif";

  but3 = new Image() ;
  but3.src = "/images/main_button2_off.gif";
  but4 = new Image() ;
  but4.src = "/images/main_button2_on.gif";

  but5 = new Image() ;
  but5.src = "/images/main_button3_off.gif";
  but6 = new Image() ;
  but6.src = "/images/main_button3_on.gif"; 

  but7 = new Image() ;
  but7.src = "/images/main_button4_off.gif";
  but8 = new Image() ;
  but8.src = "/images/main_button4_on.gif";
  
  but9 = new Image() ;
  but9.src = "/images/main_button5_off.gif";
  but10 = new Image() ;
  but10.src = "/images/main_button5_on.gif";
  
  but11 = new Image() ;
  but11.src = "/images/main_button6_off.gif";
  but12 = new Image() ;
  but12.src = "/images/main_button6_on.gif";
  
  but13 = new Image() ;
  but13.src = "/images/main_button7_off.gif";
  but14 = new Image() ;
  but14.src = "/images/main_button7_on.gif";
  
  but15 = new Image() ;
  but15.src = "/images/main_button8_off.gif";
  but16 = new Image() ;
  but16.src = "/images/main_button8_on.gif";

  but17 = new Image() ;
  but17.src = "/images/main_button9_off.gif";
  but18 = new Image() ;
  but18.src = "/images/main_button9_on.gif";
  
  but19 = new Image() ;
  but19.src = "/images/main_button10_off.gif";
  but20 = new Image() ;
  but20.src = "/images/main_button10_on.gif";
  
  
function chkVer(imagename,objectsrc)
{
var n=navigator.appName
var v=parseInt(navigator.appVersion)
var browsok=((n=="Netscape")&&(v>=3))
var browsok2=((n=="Microsoft Internet Explorer")&&(v>=4))
if ((browsok)||(browsok2))
document.images[imagename].src=eval(objectsrc+".src")
}



/***********************************************
* Switch Menu script- by Martial B of http://getElementById.com/
* Modified by Dynamic Drive for format & NS4/IE4 compatibility
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

if (document.getElementById){ //DynamicDrive.com change
document.write('<style type="text/css">\n')
document.write('.submenu{display: none;}\n')
document.write('</style>\n')
}

function SwitchMenu(obj){
	if(document.getElementById){
	var el = document.getElementById(obj);
	var ar = document.getElementById("masterdiv").getElementsByTagName("span"); //DynamicDrive.com change
		if(el.style.display != "block"){ //DynamicDrive.com change
			for (var i=0; i<ar.length; i++){
				if (ar[i].className=="submenu") //DynamicDrive.com change
				ar[i].style.display = "none";
			}
			el.style.display = "block";
		}else{
			el.style.display = "none";
		}
	}
}