在Mvc 4.0中以多种形式处理隐藏字段

I am having multiple forms in one page and that page inherits one single model.Every form submission requires a common value. So, common value is stored in hidden field. The hidden field is kept global i.e outside of all the forms but my problem is whenever I submit form, that hidden field is coming to be empty.The hidden field is I am having multiple forms in one page and that