try take advantage of inaccurate large exponent of double floating point to compare decimal numbers

large_detable_float.js

//try take advantage of inacurate large exponent of double floating point to compare decimal numbers.
var large_detable_float=function(point){  if(point){this.maxfloat=parseFloat("1"+Array((Number.MAX_SAFE_INTEGER*point).toFixed(0).length+1).join("0"));}this.a=0; this.b=0;};
large_detable_float.prototype={
 maxfloat:100000000,
 add:function(a){ if(a<0) return this.sub(-a);
   if(this.a+a<this.maxfloat)this.a+=a;
   else {this.a-=this.maxfloat;this.b+=this.maxfloat;this.a+=a;}
 },
 sub:function(a){ if(a<0) return this.add(-a);
   if(this.a-a>-this.maxfloat)this.a-=a;
   else {this.a+=this.maxfloat;this.b-=this.maxfloat;this.a-=a;}
 },
 delta:function(other){
  return (this.b-other.b)+(this.a-other.a);
 }
}
/*
var delta=
{
a:new large_detable_float(0.00000001 ),
b:new large_detable_float(0.00000001 )
}
delta.a.add(1)
delta.b.add(1)
delta.a.delta(delta.b);
*/