<!DOCTYPE HTML>
+操作符 var mynum=1+5; var mychar="中"+"国"; var mywrongchar=中+国;_//故意写错的代码_ document.write("mynum的值:"+mynum+"<br>"); document.write("mychar的值:"+mychar+"<br>"); document.write("mywrongchar的值:"+mywrongchar);//_为何Dreamweaver不报错,而且不显示上述两行的输出值?_