var HomeOff         = new Image(); HomeOff.src        ="/images/HomeButton.gif";
var HomeOn          = new Image(); HomeOn.src         ="/images/HomeButtonAlt.gif";
var LinksOff        = new Image(); LinksOff.src       ="/images/LinksButton.gif";
var LinksOn         = new Image(); LinksOn.src        ="/images/LinksButtonAlt.gif";
var ContactUsOff    = new Image(); ContactUsOff.src   ="/images/ContactUsButton.gif";
var ContactUsOn     = new Image(); ContactUsOn.src    ="/images/ContactUsButtonAlt.gif";
var DataOff         = new Image(); DataOff.src        ="/images/DataButton.gif";
var DataOn          = new Image(); DataOn.src         ="/images/DataButtonAlt.gif";
var ProjectsOff     = new Image(); ProjectsOff.src    ="/images/ProjectsButton.gif";
var ProjectsOn      = new Image(); ProjectsOn.src     ="/images/ProjectsButtonAlt.gif";
var LoginOff        = new Image(); LoginOff.src       ="/images/LoginButton.gif";
var LoginOn         = new Image(); LoginOn.src        ="/images/LoginButtonAlt.gif";
var FontUpOff       = new Image(); FontUpOff.src      ="/images/FontUpButton.gif";
var FontUpOn        = new Image(); FontUpOn.src       ="/images/FontUpButtonAlt.gif";
var FontDownOff     = new Image(); FontDownOff.src    ="/images/FontDownButton.gif";
var FontDownOn      = new Image(); FontDownOn.src     ="/images/FontDownButtonAlt.gif";
var PapersOff       = new Image(); PapersOff.src      ="/images/PapersButton.gif";
var PapersOn        = new Image(); PapersOn.src       ="/images/PapersButtonAlt.gif";
var PresentationsOff= new Image(); PresentationsOff.src="/images/PresentationsButton.gif";
var PresentationsOn = new Image(); PresentationsOn.src ="/images/PresentationsButtonAlt.gif";


function switchImages(_onOff) {
if      (_onOff=="HomeOff"       ) {document.imgHome.src        =HomeOff.src;        }
else if (_onOff=="HomeOn"        ) {document.imgHome.src        =HomeOn.src;         }
else if (_onOff=="LinksOff"      ) {document.imgLinks.src       =LinksOff.src;       }
else if (_onOff=="LinksOn"       ) {document.imgLinks.src       =LinksOn.src;        }
else if (_onOff=="ContactUsOff"  ) {document.imgContactUs.src   =ContactUsOff.src;   }
else if (_onOff=="ContactUsOn"   ) {document.imgContactUs.src   =ContactUsOn.src;    }  
else if (_onOff=="DataOff"       ) {document.imgData.src        =DataOff.src;        }
else if (_onOff=="DataOn"        ) {document.imgData.src        =DataOn.src;         }
else if (_onOff=="ProjectsOff"   ) {document.imgProjects.src    =ProjectsOff.src;    }
else if (_onOff=="ProjectsOn"    ) {document.imgProjects.src    =ProjectsOn.src;     }
else if (_onOff=="LoginOff"      ) {document.imgLogin.src       =LoginOff.src;       }
else if (_onOff=="LoginOn"       ) {document.imgLogin.src       =LoginOn.src;        }
else if (_onOff=="FontUpOff"     ) {document.imgFontUp.src      =FontUpOff.src;      }
else if (_onOff=="FontUpOn"      ) {document.imgFontUp.src      =FontUpOn.src;       }
else if (_onOff=="FontDownOff"   ) {document.imgFontDown.src    =FontDownOff.src;    }
else if (_onOff=="FontDownOn"    ) {document.imgFontDown.src    =FontDownOn.src;     }
else if (_onOff=="PapersOff"     ) {document.imgPapers.src      =PapersOff.src;      }
else if (_onOff=="PapersOn"      ) {document.imgPapers.src      =PapersOn.src;       }
else if (_onOff=="PresentationsOff") {document.imgPresentations.src=PresentationsOff.src;      }
else if (_onOff=="PresentationsOn" ) {document.imgPresentations.src=PresentationsOn.src;       }
}