纯js验证代码

function checkname(){var username=document.getElementById("textfield1").value;if(username==""){document.getElementById("p1").innerHTML="User name cannot be empty";return false;}else {document.getElementById("p1").innerHTML="";}}function checkpassword(){var password=document.getElementById("textfield2").value;if(password==""){document.getElementById("p2").innerHTML="Password name cannot be empty";return false;}else{document.getElementById("p2").innerHTML="";}}function checkpassword1(){var password=document.getElementById("textfield2").value;var password1=document.getElementById("textfield3").value;if(password1==""){document.getElementById("p3").innerHTML="Please enter the password again";return false;}else if(password1!=password){document.getElementById("p3").innerHTML="Two password input is not consistent";return false;}else{document.getElementById("p3").innerHTML="";}}function checkage(){var age=document.getElementById("textfield4").value;var reg = new RegExp("^([0-9]|[0-9]{2}|100)$");if(age==""){document.getElementById("p4").innerHTML="Please enter the age";return false;}else if(!reg.test(age)){document.getElementById("p4").innerHTML="Age error";return false;}else{document.getElementById("p4").innerHTML="";}}function checkmobile(){var mobile=document.getElementById("textfield5").value;var reg_mobile= new RegExp("^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$");if(mobile==""){document.getElementById("p5").innerHTML="Please enter the mobile";return false;}else if(!reg_mobile.test(mobile)){document.getElementById("p5").innerHTML="Mobile error";return false;}else{document.getElementById("p5").innerHTML="";}}

我也是简单记录。如果你有什么宝贵建议请回复指正谢谢。