browserName=navigator.appName;
browserVer=parseInt(navigator.appVersion);
if (browserVer >=3)     version="3";
else                    version="2";
        
if (version =="3")
{
   		 uno_on=new Image();
   		 uno_on.src="images/btn_acquista_on.gif";
   	 	 uno_off=new Image();
   		 uno_off.src="images/btn_acquista_off.gif";


}
        
function onbutton(imgName)
{
        if (version=="3")
        {
                document[imgName].src=eval(imgName + "on.src");
        }
}

function offbutton(imgName)
{
        if (version=="3")
        {
                document[imgName].src=eval(imgName + "off.src");
        }
}


function openWin( windowURL, windowName, windowFeatures ) 
{ 
	return window.open( windowURL, windowName, windowFeatures ) ; 
}