Google map in touch screen tablet

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touchscreen

google-api

dear all
i run my asp project using google map api , when i click right click using mouse asp page display , but when i open my project in my windows tablet type ( Getac ) the right click by holding on screen not work , .. . .?
any idea please ?

What I have tried:

google.maps.event.addListener(map, "rightclick", function(event) {
               var lat = event.latLng.lat();
               var lng = event.latLng.lng();
               var zoom = map.getZoom();
               ChdWind2 = window.open("locationsPage.aspx?lat="+lat+"&lon="+lng+"&zoom="+zoom+"&setLatLon=Set", "Popup", "toolbar=no,scrollbars=no,location=no,statusbar=no,menubar=no,resizable=0,width=600,height=650,left = 200,top = 20");
               ChdWind2.focus();