you could add the float:right property as an inline style to the button:
<input name="eCart1_View_1" type="button" class="eC_FormButton" onclick="MM_goToURL('plugins/parent','cart.php');" value="View Cart" alt="Total: <?php echo WA_eCart_DisplayMoney($eCart1, $eCart1->GrandTotal()); ?>" style="float:right;"/>
If you wanted to create a standard text link top the cart.php page,
<a href="cart.php">View Cart</a>