Validating Common Form Input - Part 3 Validating names

Single names  和username 不同，一般位字母。数字长度位(4,32)

function validate(form) {
  // Regular expression for a single name
  var rgx = /^\s*[a-z]{4,32}\s*$/i;
  if(!rgx.test(form.elements.name.value))
    return false;
  return true;
}

2.为了支持本地化。可以超找unicode.他依赖使用的encoding，普遍的为：ISO-8859-1 and UTF-8.

<meta http-equiv=\"Content-Type\" content=\"text/html;charset=ISO-8859-1\" />

 如果是ISO-8859-1，对于特殊的丹麦字符如 æ, ø and å 。他们在ASCII对应的值为 230, 248 and 314。十六进制：0xE6, 0xF8 and 0xE5

在名字中允许丹麦字符如 æ, ø and å

function validate(form) {
  // Regular expression for a single name
  var rgx = /^\s*[a-z\xe6\xf8\xe5]{4,32}\s*$/i;
  if(!rgx.test(form.elements.name.value))
    return false;
  return true;
}

如果是UTF-8，可以直接输入字符

// Regular expression for a single name
var rgx = /^\s*[a-zæøå]{4,32}\s*$/i;
if(!rgx.test(form.elements.name.value))
  return false;
return true;

话说回来，一般会有多个名称，允许有空白字符

function validate(form) {
  // Regular expression for a multiple names
  var rgx = /^\s*[a-z\s]{4,32}\s*$/i;
  if(!rgx.test(form.elements.name.value))
    return false;
  return true;
}

显然现在，也不是我们想要的。因为添加的\s，可以匹配4到32个空白字符

function validate(form) {
  // Regular expression for a multiple names
  var rgx = /^\s*[a-z]{4,}(\s+[a-z]{4,})*\s*$/i;
  if(!rgx.test(form.elements.name.value))
    return false;
  return true;
}

添加长度限制

 

function validate(form) {
  // Shortcut to save writing
  var elm = form.elements;
  // Regular expression for a multiple names
  var rgx = /^\s*[a-z]{4,}(\s+[a-z]{4,})*\s*$/i;
  if(elm.name.value.length < 33 && !rgx.test(elm.name.value))
    return false;
  return true;
}

 

处理名称中缩写、及破折号问题。like Martin, Martin L. King, M. Luther-King, Martin Luther-King etc.

function validate(form) {
  // Shortcut to save writing
  var elm = form.elements;
  // Regular expression for a multiple names
  var rgx = /^\s*[a-z]+([a-z]*\.|\s*\-\s*[a-z]+)?(\s+[a-z]+(\.|\s*\-\s*[a-z]+)?)*\s*$/i;
  if(elm.name.value.length < 33 && !rgx.test(elm.name.value))
    return false;
  return true;
}