How to add a field for numeric values in magento?

Question

I want to add a custom price filed just like the price field which can be seen when we add new products.

I can add a field like this

$fieldset->addField('price', 'text', array(
          'label'     => Mage::helper('menu')->__('Price'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'price',
      ));

But I don't know how to validate it to take only numeric values. Can anyone help me please?

Or is their any other field type in magento that takes only numeric value?

Answer 1

Add class name validate-number

$fieldset->addField('price', 'text', array(
          'label'     => Mage::helper('menu')->__('Price'),
          'class'     => 'required-entry validate-number',
          'required'  => true,
          'name'      => 'price',
      ));