function validRequired(formField,fieldLabel)
{	var result = true;
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	return result;
}

function isEmailAddr(email)
{ var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validEmail(formField,fieldLabel,required)
{	var result = true;
	if (required && !validRequired(formField,fieldLabel))
		result = false;
	if (result && (formField.value.length > 0) && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
  return result;
}

function inValidCharSet(str,charset)
{	var result = true;
	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789.");
}

function validNum(formField,fieldLabel,required)
{	var result = true;
	if (required && !validRequired(formField,fieldLabel))
		result = false;
 	if (result)
 	{
 		if (isNaN(formField.value))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	return result;
}

function validPositiveNum(formField,fieldLabel,required)
{	var result = true;
	if (!validNum(formField,fieldLabel,required))
		result = false;
 	if (result)
 	{
 		if (formField.value <= 0)
 		{
 			alert('Please enter a value greater than zero for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	return result;
}

function validZip(formField,fieldLabel,required)
{	var result = true;
	if (!validNum(formField,fieldLabel,required))
		result = false;
 	if (result)
 	{
 		if (formField.value.length > 0 && formField.value.length != 5)
 		{
 			alert('Please enter a valid Zip Code.');
			formField.focus();		
			result = false;
		}
	} 
	return result;
}

function validDate(formField,fieldLabel,required)
{	var result = true;
	if (required && !validRequired(formField,fieldLabel))
		result = false;
 	if (formField.value != "" && result)
 	{
 		var elems = formField.value.split("/");
 		result = (elems.length == 3); // should be three components
 		if (result)
 		{
 			var month = parseInt(elems[0],10);
  			var day = parseInt(elems[1],10);
 			var year = parseInt(elems[2],10);
			result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && (day > 0) && (day < 32) &&
					 allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
 		}
  		if (!result)
 		{
 			alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	return result;
}

//implemented by jwoching
//validates that an ending date occurs after a starting date
function doDateCheck(from, fromName, to, toName) {
	var ret = true;
	if (from.value != "" && to.value != "" &&
		from.value != "00/00/0000" && to.value != "00/00/0000") {
		if (Date.parse(from.value) > Date.parse(to.value)) {
				alert(toName+" date must occur after the "+fromName+" date");
			ret = false;	
	    }
    }
    return ret;
}

function validString(formField,fieldLabel,required)
{	var result = true;
	if (required && !validRequired(formField,fieldLabel))
		result = false;
 	if (formField.value != "" && result)
 	{
 		if (!isNaN(formField.value))
 		{
 			alert('Please do not enter any number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	return result;
}

function validZipState(myzip,state,stateName) {
var ZipAK = "995,996,997,998,999"; //Alaska
var ZipAL = "350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,393"; //Alabama
var ZipAR = "381,716,717,718,719,720,721,722,723,724,725,726,727,728,729,755"; //Arkansas
var ZipAZ = "850,851,852,853,854,855,856,857,858,859,860,861,862,863,864,865,873,879,880"; //Arizona
var ZipCA = "895,900,901,902,903,904,905,906,907,908,910,911,912,913,914,915,916,917,918,918,920,921,922,923,924, 925,926,927,928,929,930,931,932,933,934,935,936,937,938,940,941,942,943,944,945,946,947,948,949,950, 951,952,953,954,955,956,957,958,959,960,961,962,963,964,965,966"; //California
var ZipCO = "800,801,802,803,805,806,807,808,809,810,811,812,813,814,815,816"; //Colorado
var ZipCT = "060,061,062,063,064,065,066,067,068,069"; //Connecticut
var ZipDE = "197,198,199,216,218"; //Delaware
var ZipFL = "315,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343, 344,345,346,347,348,349"; //Florida
var ZipGA = "298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,374,399"; //Georgia
var ZipHI = "967,968,969"; //Hawaii
var ZipIA = "500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519,520,521,522,523,524, 525,526,527,528,612,681"; //Iowa
var ZipID = "832,833,834,835,836,837,838,970,990"; //Idaho
var ZipIL = "527,528,600,601,602,603,604,605,606,607,608,609,610,611,612,613,614,615,616,617,618,619,620,621,622, 623,624,625,626,627,628,629,631,634,635"; //Illinois
var ZipIN = "400,420,423,424,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479"; //Indiana
var ZipKS = "641,660,661,662,663,664,665,666,667,668,669,670,671,672,673,674,675,676,678,679,739"; //Kansas
var ZipKY = "400,401,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416,417,418,419,420,421,422,423,424, 425,426,427,452,471,476"; //Kentucky
var ZipLA = "700,701,702,703,704,705,706,707,708,709,710,711,712,713,714,717"; //Louisiana
var ZipMA = "010,011,012,013,014,015,016,017,018,019,020,021,022,023,024,025,026,027,055"; //Massachusetts
var ZipMD = "203,206,207,208,209,210,211,212,213,214,215,216,217,218,219,267"; //Maryland
var ZipME = "038,039,040,041,042,043,044,045,046,047,048,049"; //Maine
var ZipMI = "480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499"; //Michigan
var ZipMN = "550,551,552,553,554,555,556,557,558,559,560,561,562,563,564,565,566,567,540,581"; //Minnesota
var ZipMO = "621,622,623,624,625,626,627,628,629,630,631,632,633,634,635,637,638,639,640,641,642,643,644,645,646, 647,648,649,650,651,652,653,654,655,656,657,658"; //Missouri
var ZipMS = "369,381,386,387,388,389,390,391,392,393,394,395,396,397"; //Mississippi
var ZipMT = "590,591,592,593,594,595,596,597,598,599,821"; //Montana
var ZipNC = "270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,297"; //North Carolina
var ZipND = "565,557,580,581,582,583,584,585,586,587,588"; //North Dakota
var ZipNE = "515,516,680,681,682,683,684,685,686,687,688,689,690,691,692,693"; //Nebraska
var ZipNH = "030,031,032,033,034,035,036,036,037,038,039,050"; //New Hampshire
var ZipNJ = "070,071,072,073,074,075,076,077,078,079,080,081,082,083,084,085,086,087,088,089"; //New Jersey
var ZipNM = "865,870,871,872,873,874,875,876,877,878,879,880,881,882,883,884"; //New Mexico
var ZipNV = "889,890,891,892,893,894,895,896,897,898,961"; //Nevada
var ZipNY = "003,004,005,090,091,092,093,094,095,096,097,098,099,100,101,102,103,104,105,106,107,108,109,110,111, 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136, 137,138,139,140,141,142,143,144,145,146,147,148,149"; //New York
var ZipOH = "410,430,431,432,433,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452,453,454, 455,456,457,458,459,470"; //Ohio
var ZipOK = "730,731,732,733,734,735,736,737,738,739,740,741,742,743,744,745,746,748,749,679"; //Oklahoma
var ZipOR = "836,970,971,972,973,974,975,976,977,978,979,986"; //Oregon
var ZipPA = "150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174, 175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,213,260"; //Pennsylvania
var ZipRI = "027,028,029"; //Rhode Island
var ZipSC = "282,290,291,292,293,294,295,296,297,298,299,309,314"; //South Carolina
var ZipSD = "570,571,572,573,574,575,576,577"; //South Dakota
var ZipTN = "307,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,723"; //Tennessee
var ZipTX = "718,733,750,751,752,753,754,755,756,757,758,759,760,761,762,763,764,765,766,767,768,769,770,771,772, 773,774,775,776,777,778,779,780,781,782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797, 798,799,885"; //Texas
var ZipUT = "840,841,842,843,844,845,846,847,893,898"; //	Utah
var ZipVA = "201,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243, 244,245,246"; //Virginia
var ZipVT = "050,051,052,053,054,055,056,057,058,059,035,036,037"; //Vermont
var ZipWA = "835,838,972,980,981,982,983,984,985,986,987,988,989,990,991,992,993,994"; //Washington
var ZipWI = "498,499,530,531,532,533,534,535,536,537,538,539,540,541,542,543,544,545,546,547,548,549,551"; //Wisconsin
var ZipWV = "246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268"; //West Virginia
var ZipWY = "591,820,821,823,824,825,826,827,828,829,830,831"; //Wyoming
	if (myzip.length < 5) {
		alert('Invalid zip length');
		return false;
	} else {
		var zip3 = myzip.substring(0,3)
		try {
			if( eval("Zip" + state.toUpperCase()).indexOf(zip3,0) == -1 ) {
				if (stateName != null && stateName != '')
					state = stateName;
				alert("'" + myzip + "' is not a valid zip code for state " + state.toUpperCase());
				return false;
			}
		} catch(err) {
			/*alert('INVALID STATE');*/
		}
		return true;
	}
}