Validation for search form in wordpress

jQuery(function(){
        $(".search-submit").click(function(){
        $(".error").hide();
        var hasError = false;
        var searchReg = /^[a-zA-Z0-9-]+$/;
        var searchVal = $("#s").val();
        if(searchVal == '') {
            $("#s").after('<span class="error">Please enter a search term.</span>');
            hasError = true;
        } else if(!searchReg.test(searchVal)) {
            $("#s").after('<span class="error">Enter valid text.</span>');
            hasError = true;
        }
        if(hasError == true) {return false;}
    });
});