JS控制文本框禁止输入特殊字符

JS 控制不能输入特殊字符

<input type="text" class="domain" onkeyup="this.value=this.value.replace(/[^u4e00-u9fa5w]/g,"");">
this.value=this.value.replace(/[^u4e00-u9fa5w]/g,"")

 JS 控制文本框只能输入数字

<input onkeyup="value=value.replace(/[^0-9]/g,"")" onpaste="value=value.replace(/[^0-9]/g,"")" oncontextmenu = "value=value.replace(/[^0-9]/g,"")">

JS 控制文本框只能输入数字、小数点

<input onkeyup="value=value.replace(/[^-9.]/g,"")" onpaste="value=value.replace(/[^-9.]/g,"")" oncontextmenu = "value=value.replace(/[^-9.]/g,"")">

JS 控制文本框只能输入英文

<input onkeyup="value=value.replace(/[^a-zA-]/g,"")" onpaste="value=value.replace(/[^a-zA-]/g,"")" oncontextmenu = "value=value.replace(/[^a-zA-]/g,"")">

JS 控制文本框只能输入英文、数字

<input onkeyup="value=value.replace(/[^a-zA-0-9]/g,"")" onpaste="value=value.replace(/[^a-zA-0-9]/g,"")" oncontextmenu = "value=value.replace(/[^a-zA-0-9]/g,"")">

JS 控制文本框只能输入中文

<input onkeyup="value=value.replace(/[^u4E00-u9FA5]/g,"")" onpaste="value=value.replace(/[^u4E00-u9FA5]/g,"")" oncontextmenu = "value=value.replace(/[^u4E00-u9FA5]/g,"")">

JS 控制文本框只能输入中文、英文、数字

<input onkeyup="value=value.replace(/[^a-zA-0-9u4E00-u9FA5]/g,"")" onpaste="value=value.replace(/[^a-zA-0-9u4E00-u9FA5]/g,"")" oncontextmenu = "value=value.replace(/[^a-zA-0-9u4E00-u9FA5]/g,"")">

JS 控制文本框只能输入中文、英文、数字、空格

<input onkeyup="value=value.replace(/[^a-zA-0-9u4E00-u9FA5 ]/g,"")" onpaste="value=value.replace(/[^a-zA-0-9u4E00-u9FA5 ]/g,"")" oncontextmenu = "value=value.replace(/[^a-zA-0-9u4E00-u9FA5 ]/g,"")">

JS 控制文本框只能输入中文、英文、数字、小数点

<input onkeyup="value=value.replace(/[^a-zA-0-9u4E00-u9FA5.]/g,"")" onpaste="value=value.replace(/[^a-zA-0-9u4E00-u9FA5.]/g,"")" oncontextmenu = "value=value.replace(/[^a-zA-0-9u4E00-u9FA5.]/g,"")">

输入之后立即清除：

//验证输入框内不能输入特殊字符,输入就立刻清除
	 function cleanSpelChar(th){     
	    if(/[""<>%;)(&+]/.test(th.value)){           
	    $(th).val(th.value.replace(/[""<>%;)(&+]/,""));     
	    } 
	}

如果是特殊字符，禁止输入：

//验证输入框内不能输入特殊字符，输入前先作判断
function processSpelChar() {
    var code;
    var character;
    if (document.all) {
        code = window.event.keyCode;
    } else {
        code = arguments.callee.caller.arguments[0].which;
    }
    var character = String.fromCharCode(code);
    var txt = new RegExp(/[""<>%;)(&+]/);
    if (txt.test(character)) {
        if (document.all) {
            window.event.returnValue = false;
        } else {
            arguments.callee.caller.arguments[0].preventDefault();
        }
    }
}

JS替换英文特殊字符      `~!@#$%^&*()_+-=;":"|,./<>?

var subject= document.getElementById("subject").value;
subject = subject.replace(/[-\_,.!|~`()#@\%-+=/"$\%^&*{}:;"L<>?\]/g, ""); 
alert(subject);