The Google Maps JavaScript API lets you embed Google Maps in your own web pages.
Eclipse WTP support javascript code content assistance,but Google Maps Javascript API doesn't work.
GMapWTP is a tool make Eclipse WTP support Google Map API.


you can download here.


step1:download gmapwtp_version.jar
step2:find you Eclipse Plugin org.eclipse.wst.javascript.ui_xxxxxxx.jar,backup the plugin.
step3:double click the jar file or run with command java -jar gmapwtp0.1.jar
step4:on the opened swing UI,choose org.eclipse.wst.javascript.ui_xxxxxxx.jar,and output dir.
You can rename gMap2 to map if you use map as GMap2 variable.also you can use comma support more than one variables.
step5:click generate button.
step6:replace old org.eclipse.wst.javascript.ui_xxxxxxx.jar file with the generated file.
step7:restart eclipse.

How it works

GMapWTP add Javascript code content assistant config file's to Eclipse Plugin org.eclipse.wst.javascript.ui_xxxxxxx.jar.
here is the config snippet copied from the plugin,which make WTP support document.getElementById