I want to stop my form from submitting and taking an action on going to another php file if the form has no value from at least one of its variables.

```
<form id="advform" class="" action="advancedsearching.php" method="GET"  onsubmit = "return validate()" autocomplete="off"   >
                <div class="modal-header align-items-center justify-content-center py-2 ">              
                    <h4 class="modal-title">Advanced Search</h4>

                </div>
                <div class="modal-body  ">              
                    <div class="form-group">
                        <label>Title:</label>
                        <input type="text" name="title" class="form-control"  autocomplete="off"  autocomplete="false" >
                    </div>
                    <div class="form-group">
                        <label>Author:</label>
                        <input type="text" name="author" class="form-control"  autocomplete="off"  autocomplete="false" >
                    </div>
                    <div class="form-group">
                        <label>ISBN:</label>
                        <input type="text"  name="isbn" class="form-control"  autocomplete="off"  autocomplete="false" >
                    </div>

                    <div class="form-group">
                        <label>Publisher:</label>
                        <input type="text"  name="publisher" class="form-control"  autocomplete="off"  autocomplete="false" >
                    </div>
                    <div class="form-group">
                        <label>Keyword:</label>
                        <input type="text"  name="keyword" class="form-control"  autocomplete="off"  autocomplete="false" >
                    </div>
                </div>
                <div class="modal-footer justify-content-center  ">

                    <input type="submit" class="btn btn-dark"   value="Search" style="width:100%;border:1px solid black;">
                </div>
            </form>

```

tried adding

```
 <script>
function validate() {
    var x;
    x = document.getElementById("advform").value;
    if (x == "") {
        alert("Please Enter a Value");
        return false;
    };
}
</script>  

```

but it is still submitting