diff --git a/autoload/zencoding.vim b/autoload/zencoding.vim
index 0ac59c9..bd8131f 100644
--- a/autoload/zencoding.vim
+++ b/autoload/zencoding.vim
@@ -435,17 +435,17 @@ function! zencoding#toggleComment()
   let curpos = getpos('.')
   let mx = '<\%#[^>]*>'
   while 1
-    let block = zencoding#util#search_region('<!--', '-->')
-    if zencoding#util#region_is_valid(block)
+    let block = zencoding#util#searchRegion('<!--', '-->')
+    if zencoding#util#regionIsValid(block)
       let block[1][1] += 2
-      let content = zencoding#util#get_content(block)
+      let content = zencoding#util#getContent(block)
       let content = substitute(content, '^<!--\s\(.*\)\s-->$', '\1', '')
-      call zencoding#util#change_content(block, content)
+      call zencoding#util#setContent(block, content)
       silent! call setpos('.', orgpos)
       return
     endif
-    let block = zencoding#util#search_region('<[^>]', '>')
-    if !zencoding#util#region_is_valid(block)
+    let block = zencoding#util#searchRegion('<[^>]', '>')
+    if !zencoding#util#regionIsValid(block)
       let pos1 = searchpos('<', 'bcW')
       if pos1[0] == 0 && pos1[1] == 0
         return
@@ -455,7 +455,7 @@ function! zencoding#toggleComment()
     endif
     let pos1 = block[0]
     let pos2 = block[1]
-    let content = zencoding#util#get_content(block)
+    let content = zencoding#util#getContent(block)
     let tag_name = matchstr(content, '^<\zs/\{0,1}[^ \r\n>]\+')
     if tag_name[0] == '/'
       call setpos('.', [0, pos1[0], pos1[1], 0])
@@ -463,12 +463,12 @@ function! zencoding#toggleComment()
       let pos1 = searchpos('>', 'cneW')
       let block = [pos2, pos1]
     elseif tag_name =~ '/$'
-      if !zencoding#util#point_in_region(orgpos[1:2], block)
+      if !zencoding#util#pointInRegion(orgpos[1:2], block)
         " it's broken tree
         call setpos('.', orgpos)
-        let block = zencoding#util#search_region('>', '<')
-        let content = '><!-- ' . zencoding#util#get_content(block)[1:-2] . ' --><'
-        call zencoding#util#change_content(block, content)
+        let block = zencoding#util#searchRegion('>', '<')
+        let content = '><!-- ' . zencoding#util#getContent(block)[1:-2] . ' --><'
+        call zencoding#util#setContent(block, content)
         silent! call setpos('.', orgpos)
         return
       endif
@@ -479,13 +479,13 @@ function! zencoding#toggleComment()
       let pos2 = searchpos('>', 'cneW')
       let block = [pos1, pos2]
     endif
-    if !zencoding#util#region_is_valid(block)
+    if !zencoding#util#regionIsValid(block)
       silent! call setpos('.', orgpos)
       return
     endif
-    if zencoding#util#point_in_region(curpos[1:2], block)
-      let content = '<!-- ' . zencoding#util#get_content(block) . ' -->'
-      call zencoding#util#change_content(block, content)
+    if zencoding#util#pointInRegion(curpos[1:2], block)
+      let content = '<!-- ' . zencoding#util#getContent(block) . ' -->'
+      call zencoding#util#setContent(block, content)
       silent! call setpos('.', orgpos)
       return
     endif
@@ -500,9 +500,9 @@ function! zencoding#splitJoinTag()
     let content = matchstr(getline(pos1[0])[pos1[1]-1:], mx)
     let tag_name = substitute(content, '^<\(/\{0,1}[a-zA-Z][a-zA-Z0-9:_\-]*\).*$', '\1', '')
     let block = [pos1, [pos1[0], pos1[1] + len(content) - 1]]
-    if content[-2:] == '/>' && zencoding#util#cursor_in_region(block)
+    if content[-2:] == '/>' && zencoding#util#cursorInRegion(block)
       let content = content[:-3] . "></" . tag_name . '>'
-      call zencoding#util#change_content(block, content)
+      call zencoding#util#setContent(block, content)
       call setpos('.', [0, block[0][0], block[0][1], 0])
       return
     else
@@ -514,10 +514,10 @@ function! zencoding#splitJoinTag()
         let pos2 = searchpos('</' . tag_name . '>', 'cneW')
       endif
       let block = [pos1, pos2]
-      let content = zencoding#util#get_content(block)
-      if zencoding#util#point_in_region(curpos[1:2], block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
+      let content = zencoding#util#getContent(block)
+      if zencoding#util#pointInRegion(curpos[1:2], block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
         let content = matchstr(content, mx)[:-2] . '/>'
-        call zencoding#util#change_content(block, content)
+        call zencoding#util#setContent(block, content)
         call setpos('.', [0, block[0][0], block[0][1], 0])
         return
       else
@@ -547,8 +547,8 @@ function! zencoding#removeTag()
     let content = matchstr(getline(pos1[0])[pos1[1]-1:], mx)
     let tag_name = substitute(content, '^<\(/\{0,1}[a-zA-Z0-9:_\-]*\).*$', '\1', '')
     let block = [pos1, [pos1[0], pos1[1] + len(content) - 1]]
-    if content[-2:] == '/>' && zencoding#util#cursor_in_region(block)
-      call zencoding#util#change_content(block, '')
+    if content[-2:] == '/>' && zencoding#util#cursorInRegion(block)
+      call zencoding#util#setContent(block, '')
       call setpos('.', [0, block[0][0], block[0][1], 0])
       return
     else
@@ -560,9 +560,9 @@ function! zencoding#removeTag()
         let pos2 = searchpos('</' . tag_name . '>', 'cneW')
       endif
       let block = [pos1, pos2]
-      let content = zencoding#util#get_content(block)
-      if zencoding#util#point_in_region(curpos[1:2], block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
-        call zencoding#util#change_content(block, '')
+      let content = zencoding#util#getContent(block)
+      if zencoding#util#pointInRegion(curpos[1:2], block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
+        call zencoding#util#setContent(block, '')
         call setpos('.', [0, block[0][0], block[0][1], 0])
         return
       else
@@ -578,7 +578,7 @@ function! zencoding#removeTag()
 endfunction
 
 function! zencoding#balanceTag(flag) range
-  let vblock = zencoding#util#get_visualblock()
+  let vblock = zencoding#util#getVisualBlock()
   if a:flag == -2 || a:flag == 2
     let curpos = [0, line("'<"), col("'<"), 0]
   else
@@ -590,11 +590,11 @@ function! zencoding#balanceTag(flag) range
     let content = matchstr(getline(pos1[0])[pos1[1]-1:], mx)
     let tag_name = substitute(content, '^<\(/\{0,1}[a-zA-Z0-9:_\-]*\).*$', '\1', '')
     let block = [pos1, [pos1[0], pos1[1] + len(content) - 1]]
-    if !zencoding#util#region_is_valid(block)
+    if !zencoding#util#regionIsValid(block)
       break
     endif
-    if content[-2:] == '/>' && zencoding#util#point_in_region(curpos[1:2], block)
-      call zencoding#util#select_region(block)
+    if content[-2:] == '/>' && zencoding#util#pointInRegion(curpos[1:2], block)
+      call zencoding#util#selectRegion(block)
       return
     else
       if tag_name[0] == '/'
@@ -608,14 +608,14 @@ function! zencoding#balanceTag(flag) range
         let pos2 = searchpos('</' . tag_name . '>', 'cneW')
       endif
       let block = [pos1, pos2]
-      if !zencoding#util#region_is_valid(block)
+      if !zencoding#util#regionIsValid(block)
         break
       endif
-      let content = zencoding#util#get_content(block)
+      let content = zencoding#util#getContent(block)
       if a:flag == -2
-        let check = zencoding#util#region_in_region(vblock, block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
+        let check = zencoding#util#regionInRegion(vblock, block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
       else
-        let check = zencoding#util#point_in_region(curpos[1:2], block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
+        let check = zencoding#util#pointInRegion(curpos[1:2], block) && content[1:] !~ '<' . tag_name . '[^a-zA-Z0-9]*[^>]*>'
       endif
       if check
         if a:flag < 0
@@ -631,10 +631,10 @@ function! zencoding#balanceTag(flag) range
           let pos2 = searchpos('</' . tag_name . '>', 'cneW')
         endif
         let block = [pos1, pos2]
-        call zencoding#util#select_region(block)
+        call zencoding#util#selectRegion(block)
         return
       else
-        if zencoding#util#region_is_valid(block)
+        if zencoding#util#regionIsValid(block)
           if a:flag == -2
             if setpos('.', [0, block[0][0]+1, block[0][1], 0]) == -1
               break
@@ -662,14 +662,14 @@ function! zencoding#anchorizeURL(flag)
   let pos1 = searchpos(mx, 'bcnW')
   let url = matchstr(getline(pos1[0])[pos1[1]-1:], mx)
   let block = [pos1, [pos1[0], pos1[1] + len(url) - 1]]
-  if !zencoding#util#cursor_in_region(block)
+  if !zencoding#util#cursorInRegion(block)
     return
   endif
 
   let mx = '.*<title[^>]*>\s*\zs\([^<]\+\)\ze\s*<\/title[^>]*>.*'
-  let content = zencoding#util#get_content_from_url(url, 0)
+  let content = zencoding#util#getContentFromURL(url, 0)
   if len(matchstr(content, mx)) == 0
-    let content = zencoding#util#get_content_from_url(url, 1)
+    let content = zencoding#util#getContentFromURL(url, 1)
   endif
   let content = substitute(content, '\r', '', 'g')
   let content = substitute(content, '[ \n]\+', ' ', 'g')
@@ -683,7 +683,7 @@ function! zencoding#anchorizeURL(flag)
     let expand = zencoding#toString(a, 'html', 0, [])
     let expand = substitute(expand, '\${cursor}', '', 'g')
   else
-    let body = zencoding#util#get_text_from_html(content)
+    let body = zencoding#util#getTextFromHTML(content)
     let body = '{' . substitute(body, '^\(.\{0,100}\).*', '\1', '') . '...}'
 
     let blockquote = zencoding#lang#html#parseTag('<blockquote class="quote">')
@@ -703,7 +703,7 @@ function! zencoding#anchorizeURL(flag)
     let indent = substitute(getline('.'), '^\(\s*\).*', '\1', '')
     let expand = substitute(expand, "\n", "\n" . indent, 'g')
   endif
-  call zencoding#util#change_content(block, expand)
+  call zencoding#util#setContent(block, expand)
 endfunction
 
 function! zencoding#ExpandWord(abbr, type, orig)
diff --git a/autoload/zencoding/lang/html.vim b/autoload/zencoding/lang/html.vim
index c0e321b..239b82c 100644
--- a/autoload/zencoding/lang/html.vim
+++ b/autoload/zencoding/lang/html.vim
@@ -384,11 +384,11 @@ function! zencoding#lang#html#toString(settings, current, type, inline, filters,
 endfunction
 
 function! zencoding#lang#html#imageSize()
-  let img_region = zencoding#util#search_region('<img\s', '>')
-  if !zencoding#util#region_is_valid(img_region) || !zencoding#util#cursor_in_region(img_region)
+  let img_region = zencoding#util#searchRegion('<img\s', '>')
+  if !zencoding#util#regionIsValid(img_region) || !zencoding#util#cursorInRegion(img_region)
     return
   endif
-  let content = zencoding#util#get_content(img_region)
+  let content = zencoding#util#getContent(img_region)
   if content !~ '^<img[^><]\+>$'
     return
   endif
@@ -408,7 +408,7 @@ function! zencoding#lang#html#imageSize()
   let current.attr.width = width
   let current.attr.height = height
   let html = zencoding#toString(current, 'html', 1)
-  call zencoding#util#change_content(img_region, html)
+  call zencoding#util#setContent(img_region, html)
 endfunction
 
 function! zencoding#lang#html#parseTag(tag)
diff --git a/autoload/zencoding/util.vim b/autoload/zencoding/util.vim
index fc5ebfd..22b3d4c 100644
--- a/autoload/zencoding/util.vim
+++ b/autoload/zencoding/util.vim
@@ -1,7 +1,7 @@
 "==============================================================================
 " region utils
 "==============================================================================
-" delete_content : delete content in region
+" deleteContent : delete content in region
 "   if region make from between '<foo>' and '</foo>'
 "   --------------------
 "   begin:<foo>
@@ -11,7 +11,7 @@
 "   --------------------
 "   begin::end
 "   --------------------
-function! zencoding#util#delete_content(region)
+function! zencoding#util#deleteContent(region)
   let lines = getline(a:region[0][0], a:region[1][0])
   call setpos('.', [0, a:region[0][0], a:region[0][1], 0])
   silent! exe "delete ".(a:region[1][0] - a:region[0][0])
@@ -36,7 +36,7 @@ endfunction
 "   bar
 "   baz:end
 "   --------------------
-function! zencoding#util#change_content(region, content)
+function! zencoding#util#setContent(region, content)
   let newlines = split(a:content, '\n', 1)
   let oldlines = getline(a:region[0][0], a:region[1][0])
   call setpos('.', [0, a:region[0][0], a:region[0][1], 0])
@@ -72,7 +72,7 @@ endfunction
 
 " select_region : select region
 "   this function make a selection of region
-function! zencoding#util#select_region(region)
+function! zencoding#util#selectRegion(region)
   call setpos('.', [0, a:region[1][0], a:region[1][1], 0])
   normal! v
   call setpos('.', [0, a:region[0][0], a:region[0][1], 0])
@@ -80,8 +80,8 @@ endfunction
 
 " point_in_region : check point is in the region
 "   this function return 0 or 1
-function! zencoding#util#point_in_region(point, region)
-  if !zencoding#util#region_is_valid(a:region) | return 0 | endif
+function! zencoding#util#pointInRegion(point, region)
+  if !zencoding#util#regionIsValid(a:region) | return 0 | endif
   if a:region[0][0] > a:point[0] | return 0 | endif
   if a:region[1][0] < a:point[0] | return 0 | endif
   if a:region[0][0] == a:point[0] && a:region[0][1] > a:point[1] | return 0 | endif
@@ -91,29 +91,29 @@ endfunction
 
 " cursor_in_region : check cursor is in the region
 "   this function return 0 or 1
-function! zencoding#util#cursor_in_region(region)
-  if !zencoding#util#region_is_valid(a:region) | return 0 | endif
+function! zencoding#util#cursorInRegion(region)
+  if !zencoding#util#regionIsValid(a:region) | return 0 | endif
   let cur = getpos('.')[1:2]
-  return zencoding#util#point_in_region(cur, a:region)
+  return zencoding#util#pointInRegion(cur, a:region)
 endfunction
 
 " region_is_valid : check region is valid
 "   this function return 0 or 1
-function! zencoding#util#region_is_valid(region)
+function! zencoding#util#regionIsValid(region)
   if a:region[0][0] == 0 || a:region[1][0] == 0 | return 0 | endif
   return 1
 endfunction
 
 " search_region : make region from pattern which is composing start/end
 "   this function return array of position
-function! zencoding#util#search_region(start, end)
+function! zencoding#util#searchRegion(start, end)
   return [searchpairpos(a:start, '', a:end, 'bcnW'), searchpairpos(a:start, '\%#', a:end, 'nW')]
 endfunction
 
 " get_content : get content in region
 "   this function return string in region
-function! zencoding#util#get_content(region)
-  if !zencoding#util#region_is_valid(a:region)
+function! zencoding#util#getContent(region)
+  if !zencoding#util#regionIsValid(a:region)
     return ''
   endif
   let lines = getline(a:region[0][0], a:region[1][0])
@@ -128,23 +128,23 @@ endfunction
 
 " region_in_region : check region is in the region
 "   this function return 0 or 1
-function! zencoding#util#region_in_region(outer, inner)
-  if !zencoding#util#region_is_valid(a:inner) || !zencoding#util#region_is_valid(a:outer)
+function! zencoding#util#regionInRegion(outer, inner)
+  if !zencoding#util#regionIsValid(a:inner) || !zencoding#util#regionIsValid(a:outer)
     return 0
   endif
-  return zencoding#util#point_in_region(a:inner[0], a:outer) && zencoding#util#point_in_region(a:inner[1], a:outer)
+  return zencoding#util#pointInRegion(a:inner[0], a:outer) && zencoding#util#pointInRegion(a:inner[1], a:outer)
 endfunction
 
 " get_visualblock : get region of visual block
 "   this function return region of visual block
-function! zencoding#util#get_visualblock()
+function! zencoding#util#getVisualBlock()
   return [[line("'<"), col("'<")], [line("'>"), col("'>")]]
 endfunction
 
 "==============================================================================
 " html utils
 "==============================================================================
-function! zencoding#util#get_content_from_url(url, utf8)
+function! zencoding#util#getContentFromURL(url, utf8)
   silent! new
   if a:utf8
     silent! exec '0r ++enc=utf8 !'.g:zencoding_curl_command.' "'.substitute(a:url, '#.*', '', '').'"'
@@ -156,7 +156,7 @@ function! zencoding#util#get_content_from_url(url, utf8)
   return ret
 endfunction
 
-function! zencoding#util#get_text_from_html(buf)
+function! zencoding#util#getTextFromHTML(buf)
   let threshold_len = 100
   let threshold_per = 0.1
   let buf = a:buf