onKeyUp="this.value=this.value.replace(/[^\.\d]/g,'');if(this.value.split('.').length>2){this.value=this.value.split('.')[0]+'.'+this.value.split('.')[1]}">

1.文本框只能输入数字代码(小数点也不能输入)

ōnkeyup="this.value=this.value.replace(/\D/g,'''')"

ōnafterpaste="this.value=this.value.replace(/\D/g,'''')">

2.只能输入数字,能输小数点.

ōnkeyup="if(isNaN(value))execCommand(''undo'')"

ōnafterpaste="if(isNaN(value))execCommand(''undo'')">

ōnchange="if(/\D/.test(this.value)){alert(''只能输入数字'');this.value='''';}">

3.数字和小数点方法二

ōnkeypress="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"

ōnkeyup="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"

ōnblur="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

"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

ōnkeyup="value=value.replace(/[^\w\.\/]/ig,'''')">

6.只能输入数字和英文

color="Red">chun

ōnKeyUp="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:

ōnKeyPress="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:

ōnkeyup="this.value=this.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,''$1$2.$3'')">