小编Man*_*ian的帖子

我在 javascript 中遇到嵌套 if 结构的问题。任何帮助表示赞赏。

function validateForm()
{
    var a = document.forms["demo1"]["addr1"].value;
    var b = document.forms["demo1"]["city"].value;
    //var c = document.forms["demo1"]["fname"].value;
    //var d = document.forms["demo1"]["lname"].value;
    //var f = document.forms["demo1"]["phno"].value;
    //var g = document.forms["demo1"]["email"].value;
    //var g1 = document.forms["demo1"]["cemail"].value;
    //var h = document.forms["demo1"]["pwd"].value;
    //var h1 = document.forms["demo1"]["cpwd"].value;
    if(b=="" || b==null)
    {
      alert("Please enter your city");
      return false;
      break;
    }
    else if(a=="" || a==null)
        {
            alert("Please enter your address");
            return false;
            break;
        }
    else {return true;} 
}

<form name = "demo1" action = "exp2.php" …

我正在尝试编译一个程序(在OpenGL中)Ubuntu,但是我收到了这个错误

fatal error: common.h: No such file or directory

我不确定我需要为此安装哪个软件包.