input輸入字元限制
阿新 • • 發佈:2019-02-18
只讀文字框內容,只能顯示,不能修改
<input readonly value="只能顯示,不能修改">
只能是中文(有閃動)
<input onkeyup="value=value.replace(/[ -~]/g,'')">
只能輸入英文和數字(有閃動)
<input onkeyup="value=value.replace(/[\W]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d] /g,''))">
只能是數字,整數(有閃動)
<input onkeyup="value=value.replace(/[^\d]/g,'') "
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))">
只能是數字,整數(無閃動)
<input type="text"
onkeypress='return /^\d$/.test(String.fromCharCode(event.keyCode||event.keycode||event.which))'
oninput='this.value = this.value.replace(/\D+/g, "" )'
onpropertychange='if(!/\D+/.test(this.value)){return;};this.value=this.value.replace(/\D+/g, "")'
onblur='this.value = this.value.replace(/\D+/g, "")'/>
只能輸入數字和小數點、負數(有閃動)
<input type=text t_value="" o_value=""
onkeypress="if(!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[ \+\-]?\d+(?:\.\d+)?)?$/))this.o_value=this.value"
onkeyup="if(!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/))this.o_value=this.value"
onblur="if(!this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?|\.\d*?)?$/))this.value=this.o_value;else{if(this.value.match(/^\.\d+$/))this.value=0+this.value;if(this.value.match(/^\.$/))this.value=0;this.o_value=this.value}">
js控制 只能輸入數字、小數點、負數(有閃動)
<input name="input" type="text" onkeyup="JHshNumberText(this)" id="title">
<script language="javascript" type="text/javascript">
function JHshNumberText(a) {
var fa = "";
if (a.value.substring(0, 1) == "-")
fa = "-";
var str = (a.value.replace(/[^0-9.]/g, '')).replace(/[.][0-9]*[.]/, '.');
if (str.substring(0, 1) == ".")
str = "0" + str;
a.value = fa + str;
}
</script>
不能輸入數字(有閃動)
<input onkeyup="value=value.replace(/[\d]/g,'') "
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\d]/g,''))"
name="Numbers">
只能輸入英文字母和數字,不能輸入中文和符號(有閃動)
<input onkeyup="value=value.replace(/[^\w\.\/]/ig,'')">
只能輸入數字和指定英文chun(有閃動)
<input onKeyUp="value=value.replace(/[^\d|chun]/g,'')">