gistfile1.js

require('core')

App.IframeView = SC.View.extend({
	emptyElement: '<iframe></iframe>',
	content: '',
	noIframeText: '',
	frameBorder: 0,

	render: function() {
	    var content = this.get('content')
	    var srcKey = this.getDelegateProperty(this.displayDelegate, 'contentValueKey')
	    var src = (srcKey && content && content.get) ? content.get(srcKey) : null

		this.set('src',src)
		this.set('frameborder',this.get('frameBorder'))
		this.set('innerHTML',this.get('noIframeText'))
	}.observes('content')

})

// trying to invoke via 
// <%= view 'message_iframe', :view => 'App.IframeView', :tag => 'iframe', :content_value_key => 'body_url', :width => 730, 
// :height => 500, :bind => { :content => 'App.messageDetailController.content' } %>