如何限制文本字段中的特殊字符? 特殊字符在一个变量中分配
sample="`!@#$%^&*()"
应使用名字和姓氏
检查此样本变量值HTML代码
<input type="text" name="Firstname" value="Firstname" id="firstname">
的jQuery
if(!sample.test($("#firstname").val())){
alert("Nickname can have only alphabets and numbers.");
}
答案 0 :(得分:1)
试试这个:
function isValid(str){
return !/[~`!#$%\^&*+=\-\[\]\\';,/{}|\\":<>\?]/g.test(str);
}
if(!isValid($("#firstname").val())){
alert("Nickname can have only alphabets and numbers.");
}
OR
if(/^[a-zA-Z0-9- ]*$/.test($("#firstname").val()) == false) {
alert("Nickname can have only alphabets and numbers.");
}
以上内容仅允许字符串在a-z,A-Z,0-9范围内完全由字符组成,加上连字符和空格字符。包含任何其他字符的字符串将导致alert
。
答案 1 :(得分:0)
试试这个,
var alphanumers = /^[a-zA-Z0-9]+$/;
if(!alphanumers.test($("#firstname").val())){
alert("Nickname can have only alphabets and numbers.");
}
答案 2 :(得分:0)
没有特殊字符正则表达式:/^\s*[a-zA-Z0-9,\s]+\s*$/
$(document).ready(function () {
var charReg = /^\s*[a-zA-Z0-9,\s]+\s*$/;
$('.keyup-char').keyup(function () {
$('span.error-keyup-1').hide();
var inputVal = $(this).val();
if (!charReg.test(inputVal)) {
$(this).parent().find(".warning").show();
} else {
$(this).parent().find(".warning").hide();
}
});
});
答案 3 :(得分:0)
对于输入类型,您可以使用它(也可以防止复制粘贴):
jQuery(document).ready(function() {
jQuery("#name_name").keyup(function(event) {
name=jQuery("#input_name").val();
name=name.replace(/[^a-zA-Z 0-9.]+/g, '');
jQuery("#name_name").val(name);
}
);
}
);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="textbox" id="name_name">
答案 4 :(得分:0)
function allowCharacters(evt, strAllowedChars) {
// eg. allowCharacters('0-9|-|,|(|)') Will allow 0 to 9, -,()|
var charCode = (evt.which) ? evt.which : event.keyCode
var keycodeval = "";
var finalkeycode = "";
if (strAllowedChars != "" || strAllowedChars != null || strAllowedChars.indexOf("|") != -1) {
XstrAllowedChars = strAllowedChars.split("|");
for (strcount = 0; strcount <= XstrAllowedChars.length - 1 ; strcount++) {
if (XstrAllowedChars[strcount].search("-") != -1) {
substr = XstrAllowedChars[strcount].split("-");
if (substr[0] != substr[1]) {
if (substr[0].charCodeAt(0) <= substr[1].charCodeAt(0)) {
codeval = "( charCode >= " + substr[0].charCodeAt(0) + " && " + "charCode <= " + substr[1].charCodeAt(0) + " )";
keycodeval = keycodeval + "||" + codeval;
}
else {
codeval = "( charCode <=" + substr[0].charCodeAt(0) + " && " + "charCode >= " + substr[1].charCodeAt(0) + " )";
keycodeval = keycodeval + "||" + codeval;
}
}
else if (substr[0] == "" && substr[1] == "") {
keycodeval = keycodeval + "|| " + " charCode == 45 " + " || " + " charCode == 32";
}
}
else {
codeval = "( charCode == " + XstrAllowedChars[strcount].charCodeAt(0) + " )";
keycodeval = keycodeval + "||" + codeval;
}
}
}
newval = keycodeval.slice(2, keycodeval.length);
var retrunflag = false;
if (eval(newval)) {
//var charCode1 = (evt.which) ? evt.which : event.keyCode
if (event.keyCode != 60 && event.keyCode != 62 && event.keyCode != 94 && event.keyCode != 38) {
retrunflag = true; //event.keyCode = event.keyCode;
}
else
retrunflag = false; //event.keyCode = 0;
}
else {
retrunflag = false; //event.keyCode = 0 ;
}
//alert(retrunflag);
return retrunflag;}
或强>
function funRestrictSpecialChar(Obj, evt) {
var inputVal = $("#" + Obj.id).val();
re = /[`~!@#$%^&*()_|+\-=?;:'"<>\{\}\[\]\\\/]/gi;
var isSplChar = re.test(inputVal);
if (isSplChar) {
var no_spl_char = inputVal.replace(/[`~!@#$%^&*()_|+\-=?;:'"<>\{\}\[\]\\\/]/gi, '');
$("#" + Obj.id).val(no_spl_char);
} }