[belugin]

Ошибка вот здесь:
http://axforum.info/forums/clientscr...in_textedit.js

/**
	* Show JS Prompt and filter result
	*
	* @param	string	Text for the dialog
	* @param	string	Default value for the dialog
	*
	* @return	string
	*/
	this.show_prompt = function(dialogtxt, defaultval)
	{
		if (is_ie7)
		{
			var returnvalue = window.showModalDialog("clientscript/ieprompt.html", { value: defaultval, label: dialogtxt, dir: document.dir, title: document.title }, "dialogWidth:320px; dialogHeight:150px; dialogTop:" + (parseInt(window.screenTop) + parseInt(window.event.clientY) + parseInt(document.body.scrollTop) - 100) + "px; dialogLeft:" + (parseInt(window.screenLeft) + parseInt(window.event.clientX) + parseInt(document.body.scrollLeft) - 160) + "px; resizable: No;");
		}
		else
		{
			var returnvalue = prompt(dialogtxt, defaultval);
		}
		
		return PHP.trim(new String(returnvalue));
	};

Надо заменить

return PHP.trim(new String(returnvalue));

на

return PHP.trim((returnvalue==null)?'':new String(returnvalue));