常用正则验证

if (!(/^(http(s)?:\/\/)?(www\.)?[\w-]+\.\w{2,4}(\/)?$/).test($("#web").val())) {
alert("请输入正确的网址");
$("#web").focus();
return false;
}

if (!(/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/).test($("#qudao").val())) {
alert("邮箱输入格式错误，请重新输入");
$("#qudao").focus();
return false;
}

if (!(/^((\d{11})|^((\d{7,8})|(\d{4}|\d{3})-(\d{7,8})|(\d{4}|\d{3})-(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1})|(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1}))$)$/gi).test($("#lianxidianhua").val())) {
alert("联系电话输入格式错误，请重新输入");
$("#lianxidianhua").focus();
return false;
}