话不多说,请看实例代码:
<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> <script type="text/javascript"> functionvalidation() { varval = document.getElementById("txtNumber").value; varregu = /^-[1-9]\d*$/; if(val !="") { if(!regu.test(val)) { document.getElementById("labResult").style.color ="red"; document.getElementById("labResult").innerHTML ="验证失败!"; }else{ document.getElementById("labResult").style.color ="green"; document.getElementById("labResult").innerHTML ="验证成功!"; } } } </script> </head> <body> <input id="txtNumber"name="txtNumber"type="text"/> <input id="btnValidation"name="btnValidation"type="button"value="校验"onclick="validation()"/> 验证结果:<label id="labResult"></label> </body> |
传送门
使用JavaScript正则表达式校验非正整数:http://www.111cn.net/wy/js-ajax/125202.htm
使用JavaScript正则表达式校验非负整数:http://www.111cn.net/wy/js-ajax/125206.htm
使用JavaScript正则表达式校验非零正整数:http://www.111cn.net/wy/js-ajax/125207.htm