bName = navigator.appName;
 bVer = parseInt(navigator.appVersion);
    if ((bName == "Netscape" && bVer >= 3) || 
        (bName == "Microsoft Internet Explorer" && bVer >= 4)) br = "n4"; 
    else br = "n3";


 onea=new Image
 onea.src= "images/buttons/service.gif"
 oneb=new Image
 oneb.src= "images/buttons/service1.gif"


 twoa=new Image
 twoa.src= "images/buttons/product.gif"
 twob=new Image
 twob.src= "images/buttons/product1.gif"


 threea=new Image
 threea.src= "images/buttons/employ.gif"
 threeb=new Image
 threeb.src= "images/buttons/employ1.gif"


 foura=new Image
 foura.src= "images/buttons/about.gif"
 fourb=new Image
 fourb.src= "images/buttons/about1.gif"


 fivea=new Image
 fivea.src= "images/buttons/promotion.gif"
 fiveb=new Image
 fiveb.src= "images/buttons/promotion1.gif"

 sixa=new Image
 sixa.src= "images/buttons/contact.gif"
 sixb=new Image
 sixb.src= "images/buttons/contact1.gif"


 sevena=new Image
 sevena.src= "images/buttons/construction.gif"
 sevenb=new Image
 sevenb.src= "images/buttons/construction1.gif"

 function Swap1(){
 	document.one.src=oneb.src;return true;
 	}
 function Swap2(){
 	document.two.src=twob.src;return true;
 	}
 function Swap3(){
 	document.three.src=threeb.src;return true;
 	}
 function Swap4(){
 	document.four.src=fourb.src;return true;
 	}
 function Swap5(){
 	document.five.src=fiveb.src;return true;
 	}
function Swap6(){
 	document.six.src=sixb.src;return true;
 	}
function Swap7(){
 	document.seven.src=sevenb.src;return true;
 	}


 function SwapBack1(){
 	document.one.src=onea.src;return true;
 	}
 function SwapBack2(){
 	document.two.src=twoa.src;return true;
 	}
 function SwapBack3(){
 	document.three.src=threea.src;return true;
 	}
 function SwapBack4(){
 	document.four.src=foura.src;return true;
 	}
 function SwapBack5(){
 	document.five.src=fivea.src;return true;
 	}
 function SwapBack6(){
 	document.six.src=sixa.src;return true;
 	}
 function SwapBack7(){
 	document.seven.src=sevena.src;return true;
 	}