//---------------------------------------------------
function presentation(x){
neues = open(x,'Fenster1','width=760,height=600,screenX=100,screenY=100, scrollbars=no, menubar=no');

neues.self.focus();
}
//---------------------------------------------------
function extlink(x){
neues = open(x,'Fenster1','width=780,height=600,screenX=100,screenY=100, scrollbars=yes, menubar=yes, toolbar=yes, menubar=yes, resizable=yes');

neues.self.focus();
}