Using jQuery and JSON to populate forms?

There is a problem here with textarea, then I change it to a default switch value

Use this to assign values to Many Controls :

function populate(frm, data) {   
    $.each(data, function(key, value) {  
        var ctrl = $('[name="+key+"]', frm);  
        switch(ctrl.prop("type")) { 
            case "radio": case "checkbox":   
                ctrl.each(function() {
                    if($(this).attr('value') == value) $(this).attr("checked",value);
                });   
                break;  
            default:
                ctrl.val(value); 
        }  
    });  
}