Quickstart

`$('form selector').grewform({
	//Selectors are CSS/jQuery compatible. You can select inputs by values setted runtime: 'input[value=foo]'
	'rule_selector' or 'rule_selector_1 AND rule_selector_2]:
	{		
		//all actions are optional and rolls back automatically
		show:'elements_selector',	//showing elements (slideDown; slideUp on rollback)
		hide:'elements_selector',	//hiding elements (slideUp; slideDown on rollback)
		disable:'elements selecotr'	//adding disabled="disabled" to attributes (remove on rollback)
		enable:'elements selecotr'	//removing disabled from attributes (adding on rollback)
		check:'elements selecotr'	//adding disabled="checked" to attributes (remove on rollback)
		uncheck:'elements selecotr'	//removing "checked" from attributes (adding on rollback)
		set_value: { //setting value (<input> and <select> are supported, setting "selected" for <option> matched by value; restoring values on rollback)
            <select_1>:<value_1>,
            <select_2>:<value_2>,
            ...
        },
        set_html: { //setting html (restoring html on rollback)
            <select_1>:<html_1>,
            <select_2>:<html_2>,
            ...
        },
		add_options: { 			//for adding options to selects
			'<select> selector':{
	                      <value_1>:<display_value_1>,
	                      <value_2>:<display_value_2>,
			      ...
	              	}
			or
			'<select> selector': function	//should return obj formatted like described above
		},
		custom: {		//for custom actions
			match:function,		//will be called when rule selector matches at least one element
			unmatch:function,	//will be called on rollback
		}

})`

$().grewform.reset(); // reset all rules (i.e. turn off)
$().grewform.runRules(); //manualy run rules

Requirements

jQuery 1.7 or more

Check out demos

More help in article(RUS)