function validate_form() {
    if (document.getElementById("txtName").value == "") {
        alert("Please Enter your Name..");
        document.getElementById("txtName").focus();
        return false;
    }
    if (!isNaN(document.getElementById("txtName").value)) {
        alert("Name should be text");
        document.getElementById("txtName").focus();
        return false;
    }
    var mail = document.getElementById("txtEmail").value;
    if (mail == "") {
        alert("Please Enter Email");
        document.getElementById("txtEmail").focus();
        return false;
    } if (mail != "") {
        var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
        //var address = document.forms[form_id].elements[email].value;
        if (reg.test(mail) == false) {
            alert("Invalid Email Address");
            document.getElementById("txtEmail").focus();
            return false;
        }
        if (document.getElementById("txtPhone").value == "") {
            alert("Please Enter the phone ");
            document.getElementById("txtPhone").focus();
            return false;
        }
        if (isNaN(document.getElementById("txtPhone").value)) {
            alert("phone should be Numbers");
            document.getElementById("txtPhone").focus();
            return false;
        }
        if (document.getElementById("txtMsg").value == "") {
            alert("Please Enter your comments");
            document.getElementById("txtMsg").focus();
            return false;
        }
        else
            return true;
    }
}
function digitonly(input, evt)//onkeypress
{
    var keyCode = evt.which ? evt.which : evt.keyCode;
    var lisShiftkeypressed = evt.shiftKey;
    if (lisShiftkeypressed && parseInt(keyCode) != 9) {
        return false;
    }
    if ((parseInt(keyCode) >= 48 && parseInt(keyCode) <= 57) || keyCode == 37/*LFT ARROW*/ || keyCode == 39/*RGT ARROW*/ || keyCode == 8/*BCKSPC*/ || keyCode == 46/*DEL*/ || keyCode == 9/*TAB*/) {
        return true;
    }

    return false;

}
function textonly(input, evt) {
    var keycode = evt.which ? evt.which : evt.keyCode;
    if ((keycode > 64 && keycode < 91) || (keycode > 96 && keycode < 123) || keycode == 46 || keycode == 8 || keycode == 32 || keycode == 9) {
        return true;
    }
    else {
        return false;
    }
}