Magento - add WYSIWYG editor to custom widget

Question

I created a widget inside my custom module. Everything is working and the widget can be embedded onto CMS pages. However, instead of a textarea parameter type I want to add

Answer 1

Based on Rouzbeh I added small jQuery code that validate if double quotes are used:

jQuery("#widget_options textarea").keyup(function(){
if(jQuery(this).val().indexOf('"') > -1){
  jQuery(this).val(jQuery(this).val().replace('"',"'"));
  alert('No double quotes allowed, use single quotes instead.')
}
});

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