var javawsInstalled = 0;  
var javaws142Installed=0;
var javaws150Installed=0;
var javaws160Installed = 0;
isIE = "false"; 
if (navigator.mimeTypes && navigator.mimeTypes.length) { 
   x = navigator.mimeTypes['application/x-java-jnlp-file']; 
   if (x) { 
      javawsInstalled = 1; 
      javaws142Installed=1;
      javaws150Installed=1;
      javaws160Installed = 1; 
  } 
} 
else { 
   isIE = "true"; 
}