function bestimme()	
{var plz = Number(document.regen.plz.value);
 var min_Wert = 100000;
 var zeiger,lokal;
	 plz_array = new Array (0, 1662, 2827, 3253, 4109, 4931, 6120, 6484, 6842, 6918, 9117, 9456, 12101, 14776, 14943, 15306, 15890, 16303, 17036, 17139, 17268, 17291, 17309, 17493, 18055, 18356, 18437, 18528, 19061, 19258, 19288, 21339, 22335, 23562, 24119, 24537, 24837, 26546, 27432, 27472, 27570, 28199, 29614, 30855, 32105, 34132, 34471, 34508, 347516, 35108, 40822, 42100, 53175, 53925, 54295, 55545, 56470, 57080, 57339, 58339, 58515, 59955, 60435, 60549, 61479, 63741, 64743, 64832, 65366, 68259, 69121, 70178, 71543, 72250, 73087, 73312, 73479, 74613, 74722, 75015, 76157, 78054, 79112, 79227, 79235, 79312, 79410, 79888, 81829, 82362, 82383, 82481, 82544, 83229, 83233, 83425, 83512, 83646, 83705, 84056, 84347, 86701, 87401, 88333, 89301, 90001, 91218, 91278, 94099, 95180, 97788, 98693, 99986);
	 werteArray = new Array (0, 628,  657,  560,  585,  537,  521,  438,  549,  532,  701,  834,   589,   556,   526,   517,   543,   471,   536,   545,   558,   570,   530,   565,   589,   724,   656,   682,   620,   663,   647,   612,   741,   658,   769,   802,   895,   744,   761,   809,   762,   712,   782,   645,   792,   661,   596,  1208,    677,   841,  1000,  1150,   670,   811,   754,   512,   1126, 1061, 1239, 1244, 1203, 1457, 605, 653, 955, 712, 1052, 664, 534, 641, 774, 675, 1036, 1587, 952, 1041, 811, 783, 790, 783, 742, 922, 933, 731, 665, 895, 1003, 1859, 948, 1019, 1187, 1430, 1137, 2224, 1474, 1690, 1020, 1980, 755, 826, 840, 1240, 1050, 980, 780, 1010, 950, 1150, 980, 780, 720, 760, 740);
 
 for (i=0; i<plz_array.length; i++)
 {
   lokal=Math.abs(plz - plz_array[i]); 
   if(lokal < min_Wert)
   {
	min_Wert = lokal; 
	zeiger = i;
   }
 }
 return werteArray[zeiger]; 								
}