web前端|js教程
js,表单,验证
web前端-js教程
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function validatePersonalInfo(){var _first = document.info.fname.value;var _last = document.info.lname.value;var _street = document.info.street.value;var _city = document.info.city.value;var _zip = document.info.zip.value;var _phone = document.info.phone.value;var _email = document.info.email.value;if(_first.toString() == ""){console.log("Please enter a first name.");}if(_last.toString() == ""){console.log("Please enter a last name.");}if(_street.toString() == ""){console.log("Please enter your street name.");}if(_city.toString() == ""){console.log("Please enter your city.");}if(_zip.toString() == ""){console.log("Please enter your zip.");}if(_phone.toString() == ""){console.log("Please enter your phone number.");}if(_email.toString() == ""){console.log("Please enter your email.");} var checkZip = checkNum(5); var phoneInput = document.info.phone.value; var validPhone = false; var validZip = false; if(checkZip == true){ validZip = true; } else{ console.log("Invalid Zip Code" + validZip); } if(!checkPhone(phoneInput)){console.log("Phone number is invalid." + validPhone); } else{ validPhone = true; } if(validZip && validPhone){ console.log("Your form has been verified"); } } // Strips hyphens out of phone number and verifies that // phone number is valid. Any phone number in the format // xxxxxxxxxx, xxx-xxx-xxxx, or (xxx)xxx-xxxx will be valid function checkPhone(str){var regexp = /^(\d{10}|\d{3}-\d{3}-\d{4}|\(\d{3}\)\d{3}-\d{4})$/; return regexp.test(str); } function checkNum(length){var zipEntry = document.info.zip.value;var zipNum = parseInt(zipEntry, 10);if (document.info.zip.value.length == length){ if(zipNum != 0 && isNaN(zipNum) == false){return true; } else {return false; }}else { return false;} }
简单讲一下js语法：
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document.info.fname.value
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这个js表示获取name为info表单里面name是fname的input的值。
其他方法类似。
你可以将代码复制到这里运行一把
