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

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    return true;
}
function stripCharsInBag(s, bag){
	var i;
    var 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){
    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 validDate(dtStr, fmt){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	if(fmt=='a')
	{
		var strMonth=dtStr.substring(0,pos1)
		var strDay=dtStr.substring(pos1+1,pos2)
	}
	else
	{
		var strDay=dtStr.substring(0,pos1)
		var strMonth=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){
		if(fmt=='a')
			format="mm/dd/yyyy";
		else
			format="dd/mm/yyyy";
			
		alert("The date format should be: "+format)
		return false
	}
	if (strDay.length<1 || strDay.length>2  || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strMonth.length<1 || strMonth.length>2 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a 4 digit Year");
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date");
		return false;
	}
return true
}
function validEmail(email) 
{
	if(email == null || email == undefined || email == '') return false;
	if(email.length<6) return false;
	if(email.indexOf('@')<0)
		return false;
	else if(email.indexOf('@', email.indexOf('@')+1)>=0)
		return false;
	if(email.indexOf('.')<0) return false;
	if(email.indexOf('..')>=0) return false;
	if(email.indexOf('.@')>=0) return false;
	if(email.indexOf('@.')>=0) return false;
	if(email.length > 0)
	{
		var charset1 = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.@";
		for(i = 0; i < email.length; i++)
		{
			ch = email.charAt(i);
			if(charset1.indexOf(ch) < 0)
				return false;
		}
	}
	arr=email.split(".");
	if(arr[1].length<2)
		return false;
		
	return true;					
}
function validPhone(pnum)
{
	if(pnum=='')
		return false;
    var charset="0123456789()-+ ";

    for(i=0; i< pnum.length; i++)
    {
        if(charset.indexOf(pnum.charAt(i))<0)
        {   
            return false;
        }
    }
	
	if(pnum.length<7) return false;
    return true;
}
function validNumber(field, dot) 
{
	if(Trim(field.value)=='')
		return false;
		
	var valid;
	if(dot=='.')
		valid = "1234567890.";
	else
		valid = "1234567890";
		
	var ok = "yes";
	var temp;

	for (var i=0; i<field.value.length; i++)
	{
		temp = "" + field.value.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") ok = "no";
	}

	if (ok == "no") 
		return false;
	else
		return true;
}
function Trim(TRIM_VALUE)
{
	if(TRIM_VALUE.length < 1)
	{
		return "";
	}
	TRIM_VALUE = RTrim(TRIM_VALUE);
	TRIM_VALUE = LTrim(TRIM_VALUE);
	if(TRIM_VALUE=="")
		return "";
	else
		return TRIM_VALUE;
}

function RTrim(VALUE)
{
	var w_space = String.fromCharCode(32);
	var v_length = VALUE.length;
	var strTemp = "";
	if(v_length < 0)
		return "";
	
	var iTemp = v_length -1;

	while(iTemp > -1)
	{
		if(VALUE.charAt(iTemp) == w_space){}
		else
		{
			strTemp = VALUE.substring(0,iTemp +1);
			break;
		}
		iTemp = iTemp-1;

	}
	return strTemp;
} 

function LTrim(VALUE)
{
	var w_space = String.fromCharCode(32);
	if(v_length < 1)
		return"";

	var v_length = VALUE.length;
	var strTemp = "";

	var iTemp = 0;

	while(iTemp < v_length)
	{
		if(VALUE.charAt(iTemp) == w_space){}
	
		else
		{
			strTemp = VALUE.substring(iTemp,v_length);
			break;
		}
		iTemp = iTemp + 1;
	} 
	return strTemp;
}
function allowNumber(ecode)
{
	if(ecode < 48 || ecode > 57) 
		return false;
	return true;
}
function allowFloat(val,code)
{
	if((code>=48 && code<=57))
		return true;
	if( code==46 )
	{
		if(val.indexOf(".") == -1 )
			return true;
	}
		
	return false;
}