// Note: For all developers When adding a function to the file, the function should either return true or false explicetly
// Usage in jsp/html file: 		if(!checkNull(document.f1.Username,'User Name')) return false; 

var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function checkBlank(formelement,text)
{
	if (formelement.value=='')
	{
		alert('Enter '+text);
		formelement.focus();
		return false;
  }
	else
	{
	return true;
	}
}

function checkEmail(formelement,text)	
{
	if(formelement.value=='')
	{
		alert("Enter "+text);
		formelement.focus();
		return false;
	}
else
	{
		var b=formelement.value.indexOf('@');
		var c=formelement.value.indexOf('.');
		var d=c-b;
		var len=formelement.value.length;
	
		if((d==0)||(c==-1)||(b==-1)||(d==1)||((len-c)==1))
		{
			alert("Enter a valid "+text);
			formelement.focus();
			return false;
		}
		else
		{
			return true;
		}
	}
}


function checkNaN(formelement,text)
{
	if (isNaN(formelement.value))
	{
  alert('Enter Numeric '+text);
  formelement.focus();
	return false;
  }
	else
	{
	return true;
	}
}

function checkLessLen(formelement,text,len)
{
	if(formelement.value.length<parseInt(len))
	{
		alert('The '+text+' should not be less than '+len+' characters');
		formelement.focus();
		return false;
	}
	else
	{
		return true;
	}
}

function checkGreaterLen(formelement,text,len)
{
	if(formelement.value.length>parseInt(len))
	{
		alert('The '+text+' should not be Greater than '+len+' characters');
		formelement.focus();
		return false;
	}
	else
	{
		return true;
	}
}

function checkSpecialChar(formelement,text)	
{
	var msg='true';
	var a=formelement.value;
	var b=a.length;
	var cha='*`~!@#$%^&()+-[]{}/|;:,<>.?';
	var ch=cha.length;
	var i,j;
	for(i=0;i<ch;i++)
	{
		var ch1=cha.substring(i,i+1);
		for(j=0;j<b;j++)
		{
			var a1=a.substring(j,j+1);
			if(a1==ch1)
			{
				msg='Special Characters are not allowed in '+text;
				alert(msg);	
				formelement.focus();
				return false;
			}
		}
	}
	if (msg=='true')
	{
	return true;
	}
}

function checkSpecialChar2(formelement,text)	
{
	var msg='true';
	var a=formelement.value;
	var b=a.length;
	var cha='*~!@#$%^&()+-[]{}/|;:<>?';
	var ch=cha.length;
	var i,j;
	for(i=0;i<ch;i++)
	{
		var ch1=cha.substring(i,i+1);
		for(j=0;j<b;j++)
		{
			var a1=a.substring(j,j+1);
			if(a1==ch1)
			{
				msg='Special Characters are not allowed in '+text;
				alert(msg);	
				formelement.focus();
				return false;
			}
		}
	}
	if (msg=='true')
	{
	return true;
	}
}

function checkSpecialChar1(formelement,text)	
{
	var msg='true';
	var a=formelement.value;
	var b=a.length;
	var cha='*`~!@#$%^&()+-[]{}|;:,<>.?';
	var ch=cha.length;
	var i,j;
	for(i=0;i<ch;i++)
	{
		var ch1=cha.substring(i,i+1);
		for(j=0;j<b;j++)
		{
			var a1=a.substring(j,j+1);
			if(a1==ch1)
			{
				msg='Special Characters are not allowed in '+text;
				alert(msg);	
				formelement.focus();
				return false;
			}
		}
	}
	if (msg=='true')
	{
	return true;
	}
}//special char without / check

function checkSpace(formelement,text)
{
	var msg='true';
	var a=formelement.value;
	var b=a.length;
	var i,j;
		for(j=0;j<b;j++)
		{
			var a1=a.substring(j,j+1);
			if(a1==' ')
			{
				msg='Spaces are not allowed in '+text;
				alert(msg);	
				formelement.focus();
				return false;
			}
		}

	if (msg=='true')
	{
	return true;
	}
}

function checkLEZero(formelement,text)
{
	if (formelement.value <= 0)
	{
		alert('Enter the '+text+' greater than 0.');
		formelement.focus();
		return false;
	}
	else
	{
		return true;
	}
}

//Date check function from here
function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	//alert(dtStr)
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	alert("pos1" +pos1);
	alert("pos2" + pos2);
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}//end isDate()

//webaddress function check from here....
function checkURL(str)
{
	strlen = str.length;
	strlen = strlen - 1;

	firstdot = str.indexOf(".");

	str1 = str.substring(0, 4);
	
	str2 = str.substring(str1.length, str.length);
	
	seconddot = str2.indexOf(".");

	if ((firstdot == firstdot + seconddot) || (seconddot == -1) || (seconddot + firstdot == strlen - 1) || (str.indexOf("www.") == -1))
	{
		return false;
	}
	else
	{
		return true;
	}
}//end webaddress() 

//function to check the image type
function checkImage(val)
{
	if (val == "")
	{
		alert ("Click on Browse to select an image.");
		return false;
	}
	else
	{
		var d = val;
		if (d.lastIndexOf('\\') > 0)
			d = d.substring((d.lastIndexOf('\\')+1))
				i=d.length;
			j=(i-4)
			var h=d.substring(i,j);
			var h1=h.toLowerCase();
		if ((h1.lastIndexOf('.jpg') < 0) && (h1.lastIndexOf('.gif') < 0) && (h1.lastIndexOf('.jpeg') < 0) && (h1.lastIndexOf('.jpe') < 0))
		{
			alert("Invalid file format. Please select a jpg or gif file.");
			//document.dd.ClubImage.value="";
			//document.dd.ClubImage.focus();
			return false;
		}
		return true;
	}
} // end function to check image type

//function to check date in yyyy-mm-dd format
function checkDate(theFld){
	//theFld = document.frmSearch.datefrom;
	theVal = theFld.split('-')
	theMsg = "";
	if(theVal.length!=3)
	  theMsg = 'Enter date like this: YYYY-MM-DD';
	else {
	  theDate = new Date(theVal[0],(theVal[1]*1-1),theVal[2])
	  if(theDate.getYear()!=(theVal[0]*1))
		theMsg = 'Enter Year as four digits';
	  if(theDate.getMonth()!=(theVal[1]*1-1))
		theMsg += '\nEnter Month as two digits';
	  if(theDate.getDate()!=(theVal[2]*1))
		theMsg += '\nEnter Day as two digits';
	}
	if(theMsg!="") {
	  //alert(theMsg)
	  //theFld.focus();
	  //theFld.select();
	  return false;
	}
	else
	{
		return true;
	}
}