This is a very simple function I use for debugging. It can also be used to convert objects into JSON strings. Console log on FireBug is fabulous, but if you feed it an object, it usually just returns object. What this function does is take that object, or array, or any other type of variable and converts it to a json string and outputs it to the console. For instance, if you want to get the value of a variable, you would just do

o2s(myvar);

multiple variables:

o2s([myvar1,myvar2]);
o2s([myobj,myarr]);

It's small enough that I can just post it here

o2s=function(o){//Simple object parser
  ostr="";
  function getO(o){
    switch(typeof o){
      case "undefined": case "function":
        ostr += "'"+typeof o+"'";
      break;case "boolean":
        ostr += (o)?"true":"false";
      break;case "number":
        ostr += o;
      break;case "string":
        ostr += "'"+o+"'";
      break;case "object":
        if(o == null){
          ostr += "null";
        }else if(o instanceof Array){
          ostr += "[";
          for(var i=0,il=o.length;i<il;i++){
            getO(o[i]);
            ostr += ", ";
          }
          ostr=ostr.slice(0,-2)+"]";
        }else{
          ostr += "{";
        	for (var key in o){
          	ostr += "'"+key+"': ";
            getO(o[key]);
            ostr += ", ";
      		}
          ostr=ostr.slice(0,-2)+"}";
        }
      break;
    }
	}
  getO(o);
  console.log(ostr);
}

If you are using another browser, you can just set it to alert, rather than console.log on the last line