Javascript for Zip Code validation

Question

I'm attempting to have Javascript validate a user-entered zip code.

If it is within the list of valid zip codes, it should take them to a new page to schedule an appointment. If the zip code isn't in the listing, it should display a message that says that it isn't covered by the service area and then keep them on the page.

I have it working to where it takes them to the appointment page if it's valid, but it also takes them to the appointment page if it isn't valid.

Would you guys mind helping me figure this out?

Here is the page the Javascript is running on: http://platinumfactoryservice.com/service-area/

Below is the code:

<script type = "text/javascript">

function checkZip() {

var z = document.myform.zip;
var zv = z.value;
if (!/^\d{5}$/.test(zv)) {
alert ("Please enter a valid Zip Code");
document.myform.zip.value = "";
myfield = z;  // note myfield must be a global variable
setTimeout('myfield.focus(); myfield.select();' , 10);  // to fix bug in Firefox
return false;
}

var codes = [26003,26030,26031,26032,26035,26036,26037,26038,26039,26040,26041,26058,26059,26060,26062,26070,26074,26075,43713,43716,43718,43719,43747,43750,43757,43759,43768,43773,43778,43902,43905,43906,43909,43912,43913,43915,43916,43917,43927,43928,43933,43934,43935,43937,43938,43939,43940,43941,43942,43943,43947,43948,43950,43951,43952,43953,43963,43967,43971,43972,43977,43985,15004,15017,15018,15019,15021,15025,15028,15031,15034,15035,15045,15046,15047,15053,15054,15055,15056,15057,15060,15064,15071,15078,15081,15082,15088,15102,15104,15106,15108,15110,15112,15116,15120,15122,15123,15126,15127,15129,15131,15132,15133,15134,15135,15136,15137,15139,15140,15142,15143,15145,15146,15147,15148,15201,15202,15203,15204,15205,15206,15207,15208,15209,15210,15211,15212,15213,15214,15215,15216,15217,15218,15219,15220,15221,15222,15223,15224,15225,15226,15227,15228,15229,15230,15231,15232,15233,15234,15235,15236,15237,15239,15240,15241,15242,15243,15244,15250,15251,15252,15253,15254,15255,15257,15258,15259,15260,15261,15262,15264,15265,15267,15268,15270,15272,15274,15275,15276,15277,15278,15279,15281,15282,15283,15286,15289,15290,15295,15301,15312,15317,15321,15323,15339,15340,15342,15350,15361,15363,15365,15367,15376,15378,15379,15347,15330,23705,23703,23707,23708,23704,23709,23702,23701,23326,23328,23327,23322,23325,23320,23324,23323,23321,23520,23519,23541,23512,23551,23515,23529,23506,23501,23514,23521,23518,23502,23503,23505,23513,23509,23504,23508,23511,23517,23510,23507,23523,23459,23458,23450,23479,23471,23466,23467,23465,23463,23461,23451,23460,23456,23452,23455,23454,23453,23462,23464,23457,23261,23291,23260,23225,23221,23249,23222,23223,23241,23232,23224,23290,23173,23298,23273,23274,23289,23279,23282,23276,23278,23295,23219,23218,23220,23269,23286,23292,23293,23285,23284,23228,23227,23226,23229,23075,23231,23230,23294,23289,23060,23059,23075,23288,23242,23238,23250,23233,23255,23150,23058,23234,23831,23235,23237,23236,23836,23114,23112,23113,23297,23832,23120,23838,23801,23803,23804,23805,23806,23834,23111,15004,15017,15018,15019,15021,15025,15028,15031,15034,15035,15045,15046,15047,15053,15054,15055,15056,15057,15060,15064,15071,15078,15081,15082,15084,15088,15102,15104,15106,15108,15110,15112,15116,15120,15122,15123,15126,15127,15129,15131,15132,15133,15134,15135,15136,15137,15139,15140,15142,15143,15145,15146,15147,15148,15201,15202,15203,15204,15205,15206,15207,15208,15209,15210,15211,15212,15213,15214,15215,15216,15217,15218,15219,15220,15221,15222,15223,15224,15225,15226,15227,15228,15229,15230,15231,15232,15233,15234,15235,15236,15237,15239,15240,15241,15242,15243,15244,15250,15251,15252,15253,15254,15255,15257,15258,15259,15260,15261,15262,15264,15265,15267,15268,15270,15272,15274,15275,15276,15277,15278,15279,15281,15282,15283,15286,15289,15290,15295,15301,15312,15317,15321,15323,15339,15340,15342,15350,15361,15363,15365,15367,15376,15378,15379,15347,15330,43711,43717,43722,43723,43724,43725,43732,43736,43772,43778,43779,43780,43788,25504,25510,25526,25537,25541,25545,25559,25571,25701,25702,25703,25704,25705,25706,25707,25708,25709,25710,25711,25712,25713,25714,25715,25716,25717,25718,25719,25720,25721,25722,25723,25724,25725,25726,25727,25728,25729,25755,25770,25771,25772,25773,25774,25775,25776,25777,25778,25779,41101,41102,41105,41114,41129,41139,41169,41183,45619,45619,45623,45638,45645,45669,45675,45680,25011,25026,25033,25070,25082,25109,25112,25124,25143,25156,25159,25168,25177,25213,25334,25338,25357,25375,25389,25560,25569,25003,25015,25025,25035,25039,25045,25054,25061,25064,25067,25071,25075,25079,25083,25086,25102,25103,25107,25110,25126,25132,25134,25160,25162,25201,25202,25214,25301,25302,25303,25304,25305,25306,25309,25311,25312,25313,25314,25315,25317,25320,25321,25322,25323,25324,25325,25326,25327,25328,25329,25330,25331,25332,25333,25335,25336,25337,25339,25350,25356,25358,25360,25361,25362,25364,25365,25387,25392,25396,15001,15003,15005,15009,15010,15026,15027,15042,15043,15050,15052,15059,15061,15066,15074,15077,15081,16123,16136,16101,16102,16103,16105,16107,16108,16112,16115,16116,16117,16120,16121,16123,16132,16140,16141,16142,16143,16146,16148,16150,16155,16156,16157,16159,16160,16161,16172,44401,44403,44405,44406,44416,44418,44420,44422,44424,44425,44429,44430,44436,44437,44438,44440,44442,44443,44446,44451,44452,44454,44470,44471,44473,44481,44482,44483,44484,44485,44486,44488,44501,44502,44503,44504,44505,44506,44507,44509,44510,44511,44512,44513,44514,44515,44555,44619,44672,16001,16002,16003,16016,16017,16018,16020,16021,16022,16023,16024,16025,16027,16029,16030,16033,16034,16035,16037,16038,16039,16040,16041,16045,16046,16048,16050,16051,16052,16053,16055,16056,16057,16059,16061,16063,16066,15006,15007,15014,15015,15024,15030,15032,15037,15044,15049,15051,15065,15075,15076,15086,15090,15091,15101,15144,15238,44609,44701,44702,44703,44704,44705,44706,44707,44708,44709,44710,44711,44714,44718,44720,44720,44721,44730,44730,44735,44750,44767,44799,44601,44646,44647,44648,44608,44613,44614,44626,44630,44632,44640,44641,44643,44650,44652,44657,44662,44666,44669,44670,44685,44688,44689,44056,44067,44087,44203,44210,44216,44221,44222,44223,44224,44232,44232,44236,44237,44250,44260,44262,44264,44278,44286,44301,44302,44303,44304,44305,44306,44307,44308,44309,44310,44311,44313,44314,44315,44316,44317,44319,44320,44321,44325,44326,44328,44333,44334,44334,44372,44396,44398,44632,44685,44280,44256,44254,44281,44273,44258,44274,44233,44215,44235,44251,44253,44212,44282,44275,44240];  // add as many zip codes as you like, separated by commas (no comma at the end)
var found = false;
for (var i=0; i<codes.length; i++) {
if (zv == codes[i]) {
found = true;
break;
}
}

if (!found) {
alert("Sorry, the Zip Code " + zv + " is not covered by our business");
return false;
//do nothing

} else { alert("The Zip Code " + zv + " is covered by our service team. Please press okay to go forward to schedule an appointment"); document.myform.submit(); } }

</script>

Answer 1

Change onsubmit="checkZip()" to onsubmit="return checkZip()", because right now your form is always submitted.