// JavaScript Document
function checkid(uid, legalchars){
	ialpha = false;
	l=uid.length;
	//check for A-Z, a-z and 0-9 and legalchars		
	for(i=0; i<l; i++){
		if((uid.charAt(i) < "A" || uid.charAt(i) > "Z") &&
			(uid.charAt(i) < "a" || uid.charAt(i) > "z") &&
			(uid.charAt(i) < "0" || uid.charAt(i) > "9"))	{
				if(legalchars.indexOf(uid.charAt(i)) == -1){
					ialpha = true;
					break;
				}
		}
	}
	return ialpha;
}
/**
 * Ensures a value submitted in a form is numeric and is in a range
 *
 * @param   object   the form
 * @param   string   the name of the form field to check
 * @param   integer  the minimum authorized value
 * @param   integer  the maximum authorized value
 *
 * @return  boolean  whether a valid number has been submitted or not
 */
function checkNumberInRange(theForm, theFieldName, min, max)
{
    var theField         = theForm.elements[theFieldName];
    var val              = parseInt(theField.value);

    if (typeof(min) == 'undefined') {
        min = 0;
    }
    if (typeof(max) == 'undefined') {
        max = Number.MAX_VALUE;
    }

    // It's not a number
    if (isNaN(val)) {
        theField.select();
        alert(errorMsg1);
        theField.focus();
        return false;
    }
    // It's a number but it is not between min and max
    else if (val < min || val > max) {
        theField.select();
        alert(val + errorMsg2);
        theField.focus();
        return false;
    }
    // It's a valid number
    else {
        theField.value = val;
    }

    return true;
} // end of the 'checkFormElementInRange()' function

//Script for checking the Date
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

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){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=dtStr.substring(0,pos1)
	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 : dd/mm/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
}

//Checking the Email
	function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
	
	
		for(i=0;i<lstr;++i)
		{
			if ((str.charAt(i)=='.') && (str.charAt(i+1)=='.'))
			{
				 alert("Invalid E-mail ID")
				 return false
			}
			if ((str.charAt(i)=='@') && (str.charAt(i+1)=='@'))
			{
				 alert("Invalid E-mail ID")
				 return false
			}
		}
		
				
		if (str.indexOf(".")==0)
		{
		 alert("Invalid E-mail ID")
		   return false		
		}
		if (str.indexOf("@")==0)
		{
		 alert("Invalid E-mail ID")
		   return false		
		}
		if ((str.charAt(lstr-1))=='.')
		{
		 alert("Invalid E-mail ID")
		   return false		
		}
		if ((str.charAt(lstr-1))=='@')
		{
		 alert("Invalid E-mail ID")
		   return false		
		}		
		
		
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 /*if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }*/
        
		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}


function trim(inputString) 
	{

   if (typeof inputString != "string") 
   {
	return inputString; 
   }
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") 
   { 
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ")
   { 
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1)
    {
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); 
   }
   return retValue; 
	}

function isvalidphoto(file)
    {		
		file = trim(file)
		while (file.indexOf("\\") != -1)
			file = file.slice(file.indexOf("\\") + 1);
			ext = file.slice(file.lastIndexOf(".")).toLowerCase();
			if ((ext==".bmp") || (ext==".jpeg") || (ext==".gif") || (ext==".tiff") || (ext==".x-png") || (ext==".jpg"))
				return true
			else 
				alert("Invalid format for photo ")
				return false
	}	
function isvalidhtml(file)
    {		
		file = trim(file)
		while (file.indexOf("\\") != -1)
			file = file.slice(file.indexOf("\\") + 1);
			ext = file.slice(file.lastIndexOf(".")).toLowerCase();
			if ((ext==".htm") || (ext==".html"))
				return true
			else 
				alert("The file format is Invalid. It should be an HTML file.")
				return false
	}