--- a/.gitignore
+++ b/.gitignore
@@ -34,8 +34,14 @@ js/src/configure
 js/src/autom4te.cache
 # SpiderMonkey test result logs
 js/src/tests/results-*.html
 js/src/tests/results-*.txt
 
 # Java HTML5 parser classes
 parser/html/java/htmlparser/
 parser/html/java/javaparser/
+
+# Ignore the files and directory that Eclipse IDE creates
+/.project
+/.cproject
+/.settings/
+

--- a/.hgignore
+++ b/.hgignore
@@ -34,8 +34,14 @@
 # SpiderMonkey test result logs
 ^js/src/tests/results-.*\.(html|txt)$
 
 # Java HTML5 parser classes
 ^parser/html/java/(html|java)parser/
 
 # SVN directories
 \.svn/
+
+# Ignore the files and directory that Eclipse IDE creates
+^\.project$
+^\.cproject$
+^\.settings$
+