<!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"> function validation() { var val = document.getElementById("txtNumber").value; var regu = /^d+$/; //var regu = /^[1-9]d*|0$/; 亲测可用 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></html>转载自：http://www.cnblogs.com/lengzhan/p/6042730.html