jquery - Why do I get blank space on top of the page? -

i using jquery mobile make mobile version of site, @ start issue appeared. on top of page 20px thick line of white space, , when turn on inspect element " " characters before many div elements.

this problem margin of elements. elements have standard margins, headings. cause whole document shift downwards. try setting style of every element, button in left top corner , heading in menubar to:

margin-top: 0px;