// browserlibrary
var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_nav4 = (is_nav && (is_major == 4));
var is_nav6up = (is_nav && (is_major >= 5));
is_ie4 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 4.")!=-1)) ? true : false;
is_ie5 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 5.")!=-1)) ? true : false;
is_ie5_5 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 5.5")!=-1)) ? true : false;
is_ie6 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 6.")!=-1)) ? true : false;
var is_ie4up  = (is_ie && (is_major >= 4));
var is_opera = (agt.indexOf("opera") != -1);
var is_opera5up = (is_opera && (is_major >=5));


// off state for DOM browsers
function hide(label) {
	if (is_nav6up || is_ie4up || is_opera5up || is_ie5 || is_ie5_5 || is_ie6) {
      document.getElementById(label).style.visibility = 'hidden';
    }
	if (is_nav4)  { 		
      document.layers[label].visibility = 'hide';
   }
	if (is_ie4)  { 		
      document.all[label].style.visibility = 'hidden';
	}   
}

// on state for DOM browsers
function show(label) {
   if (is_nav6up || is_ie4up || is_opera5up || is_ie5 || is_ie5_5 || is_ie6) {
      document.getElementById(label).style.visibility = 'visible';
    }
	if (is_nav4)  { 		
      document.layers[label].visibility = 'show';
   }
	if (is_ie4)  { 		
      document.all[label].style.visibility = 'visible';
	}   
}