纯js实现正则表达式 验证输入框内容
<!DOCTYPE html><html><head><meta charset="utf-8"><link rel="stylesheet" type="text/css" href="css/bootstrap.min.css"></head><style>.col-md-6{padding-left: 0;}.col-md-12 .col-md-6 input{width: 100%;}</style><body><div class="container"><div class="row"><form class="col-md-8 col-lg-offset-2"><h5>输入框类型</h5><label class="control-label">1.文本框只能输入数字代码(小数点也不能输入)</label><input class="form-control" onKeyUp="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')"><br><label class="control-label">2.只能输入数字,能输小数点.</label><div class="col-md-12 form-inline" style="padding: 0;"><div class="col-md-6"><input class="form-control" onKeyUp="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')"></div><div class="col-md-6"><input class="form-control" name="txt1" onChange="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}"></div></div><br><label class="control-label">3.数字和小数点方法二</label><input class="form-control" 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><label class="control-label">4.只能输入字母和汉字</label><input class="form-control" onKeyUp="value=value.replace(/[\d]/g,'') " onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\d]/g,''))" maxlength="10" name="Numbers"> <br><label class="control-label">5.只能输入英文字母和数字,不能输入中文</label><input class="form-control" onKeyUp="value=value.replace(/[^\w\.\/]/ig,'')"> <br><label class="control-label">6.只能输入数字和英文</label><font color="Red">chun</font><input class="form-control" onKeyUp="value=value.replace(/[^\d|chun]/g,'')"> <br><label class="control-label">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:</label><input class="form-control" onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || /\.\d\d$/.test(value))event.returnValue=false"> <br><label class="control-label">8.小数点后只能有最多两位(数字,字母,中文都可输入),可以输入运算符号:</label><input class="form-control" onKeyUp="this.value=this.value.replace(/^(\-)*(\d )\.(\d\d).*$/,'$1$2.$3')"><br /><label class="control-label"> 只能是数字和小数点和加减乘際 </label><input class="form-control" type="text"onkeypress="return event.keyCode>=4&&event.keyCode <=57 " /></form></div></div></body></html>
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