请问怎么用JS判断输入框中输入的全是空格？？？

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解决方案 »

  1.   

    补充一下：我用的是编辑器，用正则换掉""后 就变成 了！求助！
      

  2.   

    <html>
    <body>
    <input type="text" id="1" />
    <input type="button" value="validator" id="2" onclick="validator();" />
    </body>
    </html>
    <script>
    function validator()
    {
    var var1 = document.getElementById("1") ;
    alert(var1);
    var parten = /^\s*$/ ;
    if(parten.test(var1))
    alert("all spaces!") ;
    else
    alert("not all spaces");
    }
    </script>
      

  3.   

    <html>
    <body>
    <input type="text" id="1" />
    <input type="button" value="validator" id="2" onclick="validator();" />
    </body>
    </html>
    <script>
    function validator()
    {
    var var1 = document.getElementById("1") ;
    alert(var1);

    //这是正则，\s匹配空格和回车等
    var parten = /^\s*$/ ;

    //执行验证
    if(parten.test(var1))
    alert("all spaces!") ;
    else
    alert("not all spaces");
    }
    </script>
      

  4.   

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  5.   

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