"<img src onerror='this.outerHTML=( function(x) { var tolerance = 1.0E-6; var h1=1; var h2=0; var k1=0; var k2=1; var b = x; do { var a = Math.floor(b); var aux = h1; h1 = a*h1+h2; h2 = aux; aux = k1; k1 = a*k1+k2; k2 = aux; b = 1/(b-a); } while (Math.abs(x-h1/k1) > x*tolerance); return h1+"/"+k1; } )(" & [Number] & ")'>"