var checkType = null;
var fieldsValid = true;
function cf_checkForm(){ 
    fieldsValid = true;
    if (document.content_form.name.value == '')  markingField('name'); else clearField('name');
    if (document.content_form.surname.value == '')  markingField('surname'); else clearField('surname');
    if (document.content_form.company.value == '')  markingField('company'); else clearField('company');
    if (!(document.content_form.email.value.search(/[@.]/) >= 0) || !(document.content_form.email.value.search(/.+@..+\...+/) >= 0) || !(document.content_form.email.value.length >= 8))  markingField('email'); else clearField('email');
    
    return fieldsValid;
}