文本框输入限制正则表达式收集

1、下面的文本框只能输入数字代码(小数点也不能输入):

CODE:
<input  onkeyup="this.value=this.value.replace(/\D/g,'')"  onafterpaste="this.value=this.value.replace(/\D/g,'')">
<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.(注意汉字.用输入法和复制上面三个是有区别的在这里)


CODE:
<input  onkeyup="if(isNaN(value))execCommand('undo')"  onafterpaste="if(isNaN(value))execCommand('undo')">
<input  onkeyup="if(isNaN(value))execCommand('undo')"  onafterpaste="if(isNaN(value))execCommand('undo')">


CODE:
<input  name=txt1  onchange="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}">
<input  name=txt1  onchange="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}">


CODE:

<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(/^\.$/))this.value=0;this.o_value=this.value}">
<input type=text t_value="" o_value="" onkeypress="if(!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))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}">

3、只能输入字母和汉字


CODE:
<input onkeyup="value=value.replace(/[\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\d]/g,''))" maxlength=10 name="Numbers">
<input onkeyup="value=value.replace(/[\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\d]/g,''))" maxlength=10 name="Numbers">

4、只能输入英文字母和数字,不能输入中文


CODE:
<input onkeyup="value=value.replace(/[^\w\.\/]/ig,'')">
<input onkeyup="value=value.replace(/[^\w\.\/]/ig,'')">

5、只能输入数字和英文chun


CODE:
<input onKeyUp="value=value.replace(/[^\d|chun]/g,'')">
<input onKeyUp="value=value.replace(/[^\d|chun]/g,'')">

6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:


CODE:
<input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || /\.\d\d$/.test(value))event.returnValue=false">
<input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || /\.\d\d$/.test(value))event.returnValue=false">

7、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


CODE:
<input onkeyup="this.value=this.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3')">
<input onkeyup="this.value=this.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3')">