- <span style="color:#000000;font-size: 16px;">1.文本框只能输入数字代码(小数点也不能输入)
- <input onkeyup="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')">
-
- 2.只能输入数字,能输小数点.
- <input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')">
- <input name=txt1 onchange="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}">
-
- 3.数字和小数点方法二
- <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(/^\.$/))this.value=0;this.o_value=this.value}">
-
- 4.只能输入字母和汉字
- <input onkeyup="value=value.replace(/[\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\d]/g,''))" maxlength=10 name="Numbers">
-
- 5.只能输入英文字母和数字,不能输入中文
- <input onkeyup="value=value.replace(/[^\w\.\/]/ig,'')">
-
- 6.只能输入数字和英文<font color="Red">chun</font>
- <input onKeyUp="value=value.replace(/[^\d|chun]/g,'')">
-
- 7.小数点后只能有最多两位(数字,中文都可输入),不能输入字母和运算符号:
- <input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || /\.\d\d$/.test(value))event.returnValue=false">
-
- 8.小数点后只能有最多两位(数字,字母,中文都可输入),可以输入运算符号:
- <input onkeyup="this.value=this.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3')">
-
- 只能是数字和小数点和加减乘際
-
- onkeypress="return event.keyCode>=4&&event.keyCode<=57"
-
-
-
- =====================================================================================================
-
- JS只能让输入框输入数字
- 说明
- 1 只能输入0到9和小数点
- 2 只能粘贴数字
- 3 不能拖动内容进来
- 4 禁止使用输入法
-
-
- <html>
- <head>
- <meta http-equiv="content-Type" content="text/html;charset=gb2312">
- <title>js 只能输入数字和小数点</title>
- <script language="JavaScript" type="text/javascript">
- function clearNoNum(obj)
- {
-
- obj.value = obj.value.replace(/[^\d.]/g,"");
-
- obj.value = obj.value.replace(/^\./g,"");
-
- obj.value = obj.value.replace(/\.{2,}/g,".");
-
- obj.value = obj.value.replace(".","$#{1}quot;).replace(/\./g,"").replace("$#{1}quot;,".");
- }
- </script>
- </head>
- <body>
- <!--把下面代码加到<body>与</body>之间-->
- 只能输入数字和小数点的文本框:<input id="input1" onkeyup="clearNoNum(this)">
- </body>
- </html>
-
-
-
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <title>输入框只能输入数字</title>
- </head>
-
- <body>
- <input type="text" name="num" id="num" onkeypress="return keypress(event)">
- <script type="text/javascript">
- function keypress(e){
- ee = e ? e : window.event ? event : null;
- var keyNum = event.keyCode;
- var keyChar = String.fromCharCode(keyNum);
- var regDig = /\d/g;
- if(regDig.test(keyChar) || keyChar == ""){
- return true;
- }
- var regDot = /\./g;
- if (regDot.test(keyChar) && !regDot.test(document.getElementById("num").value)){
- return true;
- }
- return false;
- }
- </script>
- </body>
- </html>
-
- </span>