返回JS对象的类型

返回JS对象的类型

 

function objectType(obj)
{

  var constructor = (String)(obj.constructor);
  var tokens = constructor.split(" ");

  for(var i=0; i<tokens.length; i++)
  {
    if(tokens[i].indexOf("function") != -1)
    {
      var end = tokens[i+1].indexOf("(");

      if(end == -1)
        return(tokens[i+1]);
      else
        return(tokens[i+1].substring(0, end));
    }
  }

}// END objectType

alert(objectType( 'I am a string'));     //string
alert(objectType(true));                 //boolean
alert(objectType(100));                  //number