function mat_cordierit() { Fmat_cordierit = open("materialien/mat_cordierit.html","Fenstermat_cordierit","width=650, height=500, scrollbars=yes, resizable=yes , top,  left, status=yes"); }
function mat_korund() { Fmat_korund = open("materialien/mat_korund.html","Fenstermat_korund","width=650, height=500, scrollbars=yes, resizable=yes , top,  left, status=yes"); }
function mat_periklas() { Fmat_periklas = open("materialien/mat_periklas.html","Fenstermat_periklas","width=650, height=500, scrollbars=yes, resizable=yes , top,  left, status=yes"); }
function mat_zro2() { Fmat_zro2 = open("materialien/mat_zro2.html","Fenstermat_zro2","width=650, height=500, scrollbars=yes, resizable=yes , top,  left, status=yes"); }
/* undefinierter Bereich*/
function mat_nnn() { Fmat_nnn = open("materialien/mat_nnn.html","Fenstermat_nnn","width=650, height=500, scrollbars=yes, resizable=yes , top,  left, status=yes"); }

/* Funktionsdefinition Materialien für die Keramik-Seite Ralf Köchert 17.09.2003*/