var email_on=    '../../../1_images/tool_email_on.gif';
var print_on=    '../../../1_images/tool_print_on.gif';
var font_up_on=  '../../../1_images/tool_font_up_on.gif';
var font_down_on='../../../1_images/tool_font_down_on.gif';
var collab_on=   '../../../1_images/tool_collab_on.gif';
var instructs_on=    '../../../1_images/tool_instructs_on.gif';

var email_off=    '../../../1_images/tool_email.gif';
var print_off=    '../../../1_images/tool_print.gif';
var font_up_off=  '../../../1_images/tool_font_up.gif';
var font_down_off='../../../1_images/tool_font_down.gif';
var collab_off=   '../../../1_images/tool_collab.gif';
var instructs_off=    '../../../1_images/tool_instructs.gif';

// video specific 
var transcript_on= '../../../1_images/tool_instructs_on.gif';
var video_on= '../../../1_images/tool_video_on.gif';
var trans2_on= 'images/text2_on.gif';
var transcript_off= '../../../1_images/tool_instructs.gif';
var video_off= '../../../1_images/tool_video_off.gif';
var trans2_off= 'images/text2_off.gif';