如何在css可配置按钮中转换图像按钮

Question

如何转换此图像按钮以使其成为css可配置按钮？ 在下面的代码中，存在图像提交按钮和css提交按钮。图像发送按钮是原始按钮并正常工作。我的目标是在工作的css按钮中转换此按钮....此时css按钮可见但不起作用。图像按钮作为发送按钮工作....我怎样才能实现这一目标？谢谢！

</div>
<?php endif; ?>
    <div class="fieldset">
        <h2 class="legend"><?php echo $this->__('Login Information') ?></h2>
        <ul class="form-list">
            <li class="fields">
                <div class="field">
                    <label for="password" class="required"><em>*</em><?php echo $this->__('Password') ?></label>
                    <div class="input-box">
                        <input type="password" name="password" id="password" title="<?php echo $this->__('Password') ?>" class="input-text required-entry validate-password" />
                    </div>
                </div>
                <div class="field">
                    <label for="confirmation" class="required"><em>*</em><?php echo $this->__('Confirm Password') ?></label>
                    <div class="input-box">
                        <input type="password" name="confirmation" title="<?php echo $this->__('Confirm Password') ?>" id="confirmation" class="input-text required-entry validate-cpassword" />
                    </div>
                </div>
            </li>
            <?php echo $this->getChildHtml('form.additional.info'); ?>
            <?php echo $this->getChildHtml('persistent.remember.me'); ?>
        </ul>
        <?php echo $this->getChildHtml('persistent.remember.me.tooltip'); ?>
    </div>
    <div class="buttons-set">
        <p class="required"><?php echo $this->__('* Required Fields') ?></p>
        <p class="back-link"><a href="<?php echo $this->escapeUrl($this->getBackUrl()) ?>" class="back-link"><small>&laquo; </small><?php echo $this->__('Back') ?></a></p>
        <button type="submit" title="<?php echo $this->__('Submit') ?>" class="button"><span><span><?php echo $this->__('Submit') ?></span></span></button>
        <button class="form-button-alt submit" onclick="setsubmit('<?php echo $this->__('Submit') ?>" type="button"><span><?php echo $this->__('Submit') ?></span></button>
    </div>