<!DOCTYPE html> < html > < head lang = "en" > < meta charset = "UTF-8" > < title ></ title > </ head > < body > < p >文本框只能输入数字代码(小数点也不能输入)</ p > < input onkeyup = "this.value=this.value.replace(//D/g,'')" onafterpaste = "this.value=this.value.replace(//D/g,'')" >< br >< p ></ p > < p >只能输入数字,能输小数点</ p > < input onkeyup = "if(isNaN(value))execCommand('undo')" onafterpaste = "if(isNaN(value))execCommand('undo')" >< br >< p ></ p > < input name = txt1 onchange = "if(//D/.test(this.value)){alert('只能输入数字');this.value='';}" >< br >< p ></ p > < p >数字和小数点方法二</ p > < 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(/^/.$/))this.value=0;this.o_value=this.value}" >< br >< p ></ p > < p >只能输入字母和汉字</ p > < input onkeyup = "value=value.replace(/[/d]/g,'') " onbeforepaste = "clipboardData.setData('text',clipboardData.getData('text').replace(/[/d]/g,''))" maxlength = 10 name = "Numbers" >< br >< p ></ p > < p >只能输入英文字母和数字,不能输入中文</ p > < input onkeyup = "value=value.replace(/[^/w/.//]/ig,'')" >< br >< p ></ p > < p >只能输入数字和英文</ p > < font color = "Red" >chun</ font > < input onKeyUp = "value=value.replace(/[^/d|chun]/g,'')" >< br >< p ></ p > < p >7.小数点后只能有最多两位(数字,中文都可输入),不能输入字母和运算符号</ p > < input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || //./d/d$/.test(value))event.returnValue=false">< br >< p ></ p > < p >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</ p > < p >这个正则出问题了,求各位大神现下神通,帮帮忙</ p > ———————————————————————————————————————— < p >只能输入汉字</ p > < input onkeyup = "value=value.replace(/[^/u4E00-/u9FA5]/g,'')" onbeforepaste = "clipboardData.setData('text',clipboardData.getData('text').replace(/[^/u4E00-/u9FA5]/g,''))" >< br >< p ></ p > < p >只能输入数字</ p > < input onkeyup = "value=value.replace(/[^/d]/g,'') " onbeforepaste = "clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))" >< br >< p ></ p > < p >只能输入英文和数字:</ p > < input onkeyup = "value=value.replace(/[/W]/g,'') " onbeforepaste = "clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))" >< br >< p ></ p > < p >控制输入框只能输入文字或数字,也可以不允许输入特殊字符 这里不允许输入如下字符: (像 !@#$%^&* 等)</ p > < textarea rows = 2 cols = 20 name = comments onKeypress="if ((event.keyCode > 32 && event.keyCode < 48) || (event.keyCode > 57 && event.keyCode < 65) || (event.keyCode > 90 && event.keyCode < 97)) event.returnValue = false;"></ textarea > </ body > </ html > |
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