javascript中的var_dump()

function var_dump(obj) {  if(typeof obj == "object") {     return "Type: "+typeof(obj)+((obj.constructor) ? "\nConstructor: "+obj.constructor : "")+"\nValue: " + obj;  } else {     return "Type: "+typeof(obj)+"\nValue: "+obj;  }}//end function var_dump用法：

alert(var_dump(变量名))