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//US Students
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               toc50on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_us_students_on.gif";
               toc50off = new Image(); 
               toc50off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_us_students_off.gif";	
//US Faculty
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               toc51on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_us_faculty_on.gif";
               toc51off = new Image(); 
               toc51off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_us_faculty_off.gif";	
//Ruhr Students
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               toc52on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_ruhr_students_on.gif";
               toc52off = new Image(); 
               toc52off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_ruhr_students_off.gif";	
//Ruhr Faculty
               toc53on = new Image(); 
               toc53on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_ruhr_faculty_on.gif";
               toc53off = new Image(); 
               toc53off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_ruhr_faculty_off.gif";	
//Bochum
               toc54on = new Image(); 
               toc54on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_bochum_on.gif";
               toc54off = new Image(); 
               toc54off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_bochum_off.gif";
//Dortmund
               toc55on = new Image(); 
               toc55on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_dortmund_on.gif";
               toc55off = new Image(); 
               toc55off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_dortmund_off.gif";
//Duisburg
               toc56on = new Image(); 
               toc56on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_duisburg_on.gif";
               toc56off = new Image(); 
               toc56off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_duisburg_off.gif";
//Friends and Alumni
               toc57on = new Image(); 
               toc57on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_alumni_on.gif";
               toc57off = new Image(); 
               toc57off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_alumni_off.gif";
//Expert's Directory
               toc58on = new Image(); 
               toc58on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_experts_on.gif";
               toc58off = new Image(); 
               toc58off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_experts_off.gif";	
//News
               toc59on = new Image(); 
               toc59on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_news_on.gif";
               toc59off = new Image(); 
               toc59off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_news_off.gif";	
//Join
               toc60on = new Image(); 
               toc60on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_join_on.gif";
               toc60off = new Image(); 
               toc60off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_join_off.gif";	
//Contact Us
               toc61on = new Image(); 
               toc61on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_contact_on.jpg";
               toc61off = new Image(); 
               toc61off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_contact_off.jpg";	
//Home
               toc62on = new Image(); 
               toc62on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_home_on.jpg";
               toc62off = new Image(); 
               toc62off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/nav_home_off.jpg";	
//Slide Show
               toc63on = new Image(); 
               toc63on.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/hdr_slide_on.jpg";
               toc63off = new Image(); 
               toc63off.src = "/file_depot/0-10000000/10000-20000/19447/folder/54102/hdr_slide_off.jpg";
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