function chTextin(id, txtval) {//alert('ok');
    var txt = document.getElementById(id).value;
    if (txt == txtval) {
        document.getElementById(id).value = '';
    }
}

function chTextout(id, txtval) {
    var txt = document.getElementById(id).value;
    if (txt == '') {
        document.getElementById(id).value = txtval;
    }
}


function validate_Email(elementValue) {
    var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
    return emailPattern.test(elementValue);
}

// trim function
function text_trim(stringToTrim) {
    return stringToTrim.replace(/^\s+|\s+$/g, "");
}

function chk_validate() {
    if (text_trim(document.getElementById("Name").value) == "") {
        alert("Please enter Name");
        document.getElementById("Name").focus();
        return false;
    }

    if (text_trim(document.getElementById("DaytimePhone").value) == "") {
        alert("Please enter your Daytime Phone");
        document.getElementById("DaytimePhone").focus();
        return false;
    }
}


function chk_validatenewsletter() {
    if (text_trim(document.getElementById("newsletter").value) == "" || text_trim(document.getElementById("newsletter").value) == "subscribe to our e-newsletter") {
        alert("Please enter your email address");
        document.getElementById("newsletter").focus();
        return false;
    }

    if (validate_Email(document.getElementById("newsletter").value) == false) {
        alert("Please enter correct email");
        document.getElementById("newsletter").focus();
        return false;
    }
}

function chk_Appshedulevalidate() {
    if (text_trim(document.getElementById("safname").value) == "" || text_trim(document.getElementById("safname").value) == "FIRST NAME") {
        alert("Please enter First Name");
        document.getElementById("safname").focus();
        return false;
    }

    if (text_trim(document.getElementById("salname").value) == "" || text_trim(document.getElementById("salname").value) == "LAST NAME") {
        alert("Please enter Last Name");
         document.getElementById("salname").focus();
        return false;
    }

    if (text_trim(document.getElementById("saemail").value) == "" || text_trim(document.getElementById("saemail").value) == "EMAIL") {
        alert("Please enter your email address");
        document.getElementById("saemail").focus();
        return false;
    }

    if (validate_Email(document.getElementById("saemail").value) == false) {
        alert("Please enter correct email");
        document.getElementById("saemail").focus();
        return false;
    }

    if (text_trim(document.getElementById("saphone").value) == "" || text_trim(document.getElementById("saphone").value) == "PHONE") {
        alert("Please enter your Phone");
        document.getElementById("saphone").focus();
        return false;
    }

    if (text_trim(document.getElementById("sacomment").value) == "" || text_trim(document.getElementById("sacomment").value) == "COMMENTS") {
        alert("Please enter your Comments");
        document.getElementById("sacomment").focus();
        return false;
    }   
}