if( document.images )
{
  but1 = new Image() ;
  but1.src = "/images/sdr_top_btn1_off.gif";
  but2 = new Image() ;
  but2.src = "/images/sdr_top_btn1_on.gif";

  but3 = new Image() ;
  but3.src = "/images/sdr_top_btn2_off.gif";
  but4 = new Image() ;
  but4.src = "/images/sdr_top_btn2_on.gif";

  but5 = new Image() ;
  but5.src = "/images/sdr_top_btn3_off.gif";
  but6 = new Image() ;
  but6.src = "/images/sdr_top_btn3_on.gif"; 

  but7 = new Image() ;
  but7.src = "/images/sdr_top_btn4_off.gif";
  but8 = new Image() ;
  but8.src = "/images/sdr_top_btn4_on.gif";
  
  but9 = new Image() ;
  but9.src = "/images/sdr_top_btn5_off.gif";
  but10 = new Image() ;
  but10.src = "/images/sdr_top_btn5_on.gif";
  
  but11 = new Image() ;
  but11.src = "/images/blog_on.jpg";
  but12 = new Image() ;
  but12.src = "/images/blog_off.jpg";
  
  but13 = new Image() ;
  but13.src = "/images/sdr_top_btn7_off.gif";
  but14 = new Image() ;
  but14.src = "/images/sdr_top_btn7_on.gif";
 
  but15 = new Image() ;
  but15.src = "/images/sdr_top_btn8_off.gif";
  but16 = new Image() ;
  but16.src = "/images/sdr_top_btn8_on.gif";
  
  
  // Left hand side buttons 
  but_left1 = new Image() ;
  but_left1.src = "/images/lhs_btn1_off.gif";
  but_left2 = new Image() ;
  but_left2.src = "/images/lhs_btn1_on.gif";
  
  but_left3 = new Image() ;
  but_left3.src = "/images/lhs_btn2_off.gif";
  but_left4 = new Image() ;
  but_left4.src = "/images/lhs_btn2_on.gif";
  
  but_left5 = new Image() ;
  but_left5.src = "/images/lhs_btn3_off.gif";
  but_left6 = new Image() ;
  but_left6.src = "/images/lhs_btn3_on.gif";
  
  but_left7 = new Image() ;
  but_left7.src = "/images/lhs_btn4_off.gif";
  but_left8 = new Image() ;
  but_left8.src = "/images/lhs_btn4_on.gif";
  
  but_left9 = new Image() ;
  but_left9.src = "/images/lhs_btn5_off.gif";
  but_left10 = new Image() ;
  but_left10.src = "/images/lhs_btn5_on.gif";
  
  but_left11 = new Image() ;
  but_left11.src = "/images/lhs_btn6_off.gif";
  but_left12 = new Image() ;
  but_left12.src = "/images/lhs_btn6_on.gif";
  
  but_left13 = new Image() ;
  but_left13.src = "/images/lhs_btn7_off.gif";
  but_left14 = new Image() ;
  but_left14.src = "/images/lhs_btn7_on.gif";
  
  but_left15 = new Image() ;
  but_left15.src = "/images/lhs_btn8_off.gif";
  but_left16 = new Image() ;
  but_left16.src = "/images/lhs_btn8_on.gif";
  
  but_left17 = new Image() ;
  but_left17.src = "/images/lhs_btn9_off.gif";
  but_left18 = new Image() ;
  but_left18.src = "/images/lhs_btn9_on.gif";
  
  but_left19 = new Image() ;
  but_left19.src = "/images/lhs_btn10_off.gif";
  but_left20 = new Image() ;
  but_left20.src = "/images/lhs_btn10_on.gif";
  
  /* Special buttons for LHS login/logout */
  lhs_acct_in_off = new Image() ;
  lhs_acct_in_off.src = "/images/lhs_btn_login_off.gif";
  lhs_acct_in_on = new Image() ;
  lhs_acct_in_on.src = "/images/lhs_btn_login_on.gif";
  
  lhs_acct_out_off = new Image() ;
  lhs_acct_out_off.src = "/images/lhs_btn_logout_off.gif";
  lhs_acct_out_on = new Image() ;
  lhs_acct_out_on.src = "/images/lhs_btn_logout_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";
		}
	}
}