var xOp7Up,xOp6Dn,xIE4Up,xIE4,xIE5,xNN4,xUA=navigator.userAgent.toLowerCase();
if(window.opera){
var i=xUA.indexOf('opera');
if(i!=-1){var v=parseInt(xUA.charAt(i+6));
xOp7Up=v>=7;
xOp6Dn=v<7;
}
}
else if(navigator.vendor!='KDE' && document.all && xUA.indexOf('msie')!=-1){xIE4Up=parseFloat(navigator.appVersion)>=4;
xIE4=xUA.indexOf('msie 4')!=-1;
xIE5=xUA.indexOf('msie 5')!=-1;
}
else if(document.layers){xNN4=true;
}
xMac=xUA.indexOf('mac')!=-1;
function xDef(){for(var i=0; 
i<arguments.length; 
++i){
if(typeof(arguments[i])=='undefined') return false;
}
return true;
}
function xDisplay(e,s){if(!(e=xGetElementById(e))) return null;
if(e.style && xDef(e.style.display)) {if (xStr(s)) e.style.display = s;return e.style.display;
}
return null;
}
function xGetElementById(e){if(typeof(e)!='string') return e;
if(document.getElementById) e=document.getElementById(e);
else if(document.all) e=document.all[e];
else e=null;return e;
}
function xStr(s){for(var i=0; 
i<arguments.length; 
++i){
if(typeof(arguments[i])!='string') return false;
}
return true;
}