rem: var els = this.MBcontent.getElementsBySelector('input:not([type~=hidden]), select, textarea, a[href]'); 
add: var els = this.MBcontent.getElementsBySelector('input:not([type~=hidden]), select, textarea, button, a[href]'); 
context: 	_findFocusableElements: function(){ // Collect form elements or links from MB content		var els = this.MBcontent.getElementsBySelector('input:not([type~=hidden]), select, textarea, a[href]');		els.invoke('addClassName', 'MB_focusable');		return this.MBcontent.getElementsByClassName('MB_focusable');	},
meta: 2672	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2672/b81e0a42ead525295659ff464b6d082e19b65290/modalbox.js/buggy/modalbox.js