Question

My purpose is user enter only email or mobile number. I have the partial success in that code notify user in OR logic

but… if user want to give both details to me email & mobile no. and entered that info incorrectly then he/she will notified for that to current the data.

<form action="index.php" method="post">
    <label for="email">Your E-Mail Address *</label>
       <input id="UserEmail" type="text" name="email" maxlength="80" size="30"/>
            </p><p>
             Or   
             </p><p>
    <label for="mobile">Mobile Number *</label>
     <input id="mobile" type="text" name="mobile" maxlength="50" size="30" /></p>

below is jquery code

var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
var emailaddressVal = $("#UserEmail").val();

// email & mobile input cheak
if(emailaddressVal == '' && $("#mobile").val() == '') {
    $("#UserEmail").after('<p><span class="error">Please enter your email address.</span></p>')
    $("#mobile").after('<p><span class="error">Please enter your Mobile number.</span></p>')
    hasError = true;
}  
// validating currect email
else if(!emailReg.test(emailaddressVal)) {
    $("#UserEmail").after('<p><span class="error">Enter a valid email address.</span></p>') 
    hasError = true;
} 
// Mobile number
else if( $("#mobile").val()) {
    $("#mobile").after('<p><span class="error">Enter currect Mobile number.</span></p>')
    hasError = true;
}

Answer 1

Solution is here

    var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
    var mobileReg =  /^\d\d\d\d\d\d\d\d\d\d$/m;
    var emailaddressVal = $("#UserEmail").val();
    var mobileval = $("#mobile").val();

   //state chk both blank if yes alert
   //OR logic 0-0 
    if(emailaddressVal == '' && mobileval == '') {
        $("#UserEmail").after('<p><span class="error blurry">Please enter your email address.</span></p>')
        .effect("shake", { times:3 }, 20); console.log("email");
        $("#mobile").after('<p><span class="error blurry">Please enter your Mobile number.</span></p>')
        .effect("shake", { times:3 }, 20); console.log("mobile");
        hasError = true;
    }

    //chk mobile have value but not email
    //OR logic 1-0 
    else if(!mobileReg.test(mobileval) && emailaddressVal == '') {
        $("#mobile").after('<p><span class="error blurry">Enter currect Mobile number.</span></p>')
        .effect("shake", { times:3 }, 20);console.log("currect mobile");
         hasError = true;
    }
    //chk mobile dont hv the value but email have
    //OR logic 0-1 
    if(!emailReg.test(emailaddressVal) && mobileval == '') {
        $("#UserEmail").after('<p><span class="error blurry">Enter a valid email address.</span></p>')
        .effect("shake", { times:3 }, 20); console.log("valid email");

        hasError = true;


    }
    //chk the input mobile & email have value
    //OR logic 1-1 
    else        
    if(!emailReg.test(emailaddressVal) &&!mobileReg.test(mobileval)) {
        $("#UserEmail").after('<p><span class="error blurry">Enter a valid email address.</span></p>')
        .effect("shake", { times:3 }, 20); console.log("valid email combination");

        $("#mobile").after('<p><span class="error blurry">Enter currect Mobile number.</span></p>')
        .effect("shake", { times:3 }, 20);console.log("currect mobile combination");

        hasError = true;


    }