throw Satement in Javascript

var x=prompt("Enter 1 t0 10 ,"");
try
  { 
  if(x==1)
    {
    throw "One";
    }
  else if(x<5)
    {
    throw "X greater five";
    }
 
  }
catch(Error)
  {
  if(Error=="One")
    {
    document.write("Error 1.");
    }
  if(Error==X greater five")
    {
    document.write("Error 2);
    }

  }