The code below will go through an html document, get all forms and do a pop-up alert of the names of each form.

var formsCollection = document.getElementsByTagName(form);

for(var i=0;i<formsCollection.length;i++)

{

   alert(formsCollection[i].name);

}

This is just a start to see if you are getting the reult you require. Thereafter, remove the alert and continue to do what you need to.