1.标签上直接替换方法:
JS 控制不能输入特殊字符
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<input type="text"class="domain"onkeyup="this.value=this.value.replace(/[^u4e00-u9fa5w]/g,'')";
this.value=this.value.replace(/[^u4e00-u9fa5w]/g,'')
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JS 控制文本框只能输入数字
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<
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
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<
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英文
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<
input
onkeyup
=
"value=value.replace(/[^\a-\z\A-\Z]/g,'')"
onpaste
=
"value=value.replace(/[^\a-\z\A-\Z]/g,'')"
oncontextmenu
=
"value=value.replace(/[^\a-\z\A-\Z]/g,'')"
>
|
JS 控制文本框只能输入英文、数字
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<
input
onkeyup
=
"value=value.replace(/[^\a-\z\A-\Z0-9]/g,'')"
onpaste
=
"value=value.replace(/[^\a-\z\A-\Z0-9]/g,'')"
oncontextmenu
=
"value=value.replace(/[^\a-\z\A-\Z0-9]/g,'')"
>
|
JS 控制文本框只能输入中文
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<
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
1
|
<
input
onkeyup
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5]/g,'')"
onpaste
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5]/g,'')"
oncontextmenu
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5]/g,'')"
>
|
JS 控制文本框只能输入中文、英文、数字、空格
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|
<
input
onkeyup
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\ ]/g,'')"
onpaste
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\ ]/g,'')"
oncontextmenu
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\ ]/g,'')"
>
|
JS 控制文本框只能输入中文、英文、数字、小数点
1
|
<
input
onkeyup
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\.]/g,'')"
onpaste
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\.]/g,'')"
oncontextmenu
=
"value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\.]/g,'')"
>
|
2.输入之后立即清除:
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//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(/["
'<>%;)(&+]/,
""
));
}
}
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3.如果是特殊字符,禁止输入:
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//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();
}
}
}
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