registration.js

/*document.getElementsByTagName("li").style.display="none";*/
function checkerror(){

var mobile_no=document.getElementById("mobile_no").value;
var username=document.getElementById("username").value;
var email=document.getElementById("email_id").value;
var pass1=document.getElementById("pass1").value;
var pass2=document.getElementById("pass2").value;
var phn=/^(?:(?:\+|0{0,2})91(\s*[\ -]\s*)?|[0]?)?[789]\d{9}|(\d[ -]?){10}\d$/
var em=/^([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5})$/
var passtest=/^[A-Za-z0-9@_\.]{1,}$/
var uid=/^[A-Za-z0-9@_\.]{1,}$/

    if(phn.test(mobile_no)){
        document.getElementById("error_mobile").style.visibility="hidden"
    }
    else{
        document.getElementById("error_mobile").style.visibility="visible";
        return false;
    }
    if(em.test(email)){
        document.getElementById("error_email").style.visibility="hidden"
    }
    else{
        document.getElementById("error_email").style.visibility="visible"
        return false;
    }
    if(pass1!=pass2){
        document.getElementById("error_pass").style.visibility="visible";
        return false;
    }
    else{
        document.getElementById("error_pass").style.visibility="hidden"
    }
    if(uid.test(pass1)){
        document.getElementById("error_blank").style.visibility="hidden";
    }
    else{

        document.getElementById("error_blank").style.visibility="visible";
        return false;

    }
    if(uid.test(username)){
        document.getElementById("error_username").style.visibility="hidden"
    }
    else{
        document.getElementById("error_username").style.visibility="visible";
        return false;
    }
}