i m working on a code, i can’t figure out why the page layout get disturbed while switching between this page and when u click edit. can anyone help me? 
edit:i fixed it, though i have a question i have a long page with divs and lot of form data and php. should i start the form tag after body and end it before body tags ends?
If the <form> tag is the first element after the <body> starts and you are having it wrap around the entire pages content (for some reason) then yes you would have to have it be the last closing element
<body>
[b]<form>[/b]
<!--tags-->
[b]</form>[/b]
</body>