$('#signup').click(function() {
//validate and if it is valid serialize the form
//else alert and return


var isFormValid = true;
    $(".signup-form .required input").each(function(index, value){
        if ($.trim($(value).val()).length == 0){
            $(value).parent().addClass("highlight");
            isFormValid = false;
        } else {
            $(value).parent().removeClass("highlight");
        }
    });

if(isFormValid ){
   $.post( 'validation.php', $('.signup-formt').serialize(), function( data ) {
 
  });
}else{
  alert("Please fill in all the required fields (highlighted in red)");
}
 });

 $('#signup').click(function(event) {

 event.preventDefault(); 
//validate and if it is valid serialize the form
//else alert and return


var isFormValid = true;
    $(".signup-form .required input").each(function(index, value){
        if ($.trim($(value).val()).length == 0){
            $(value).parent().addClass("highlight");
            isFormValid = false;
        } else {
            $(value).parent().removeClass("highlight");
        }
    });

if(isFormValid ){
   $.post( 'validation.php', $('.signup-formt').serialize(), function( data ) {
 
  });
}else{
  alert("Please fill in all the required fields (highlighted in red)");
}
 });