// JavaScript Document
function trim(str) {
    return ltrim(rtrim(str, ' '), ' ');
}

function ltrim(str) {
    var chars=' ';
	chars = chars || "\\s";
    return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}

function rtrim(str) {
    var chars=' ';
    chars = chars || "\\s";
    return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}


//==validation functions;
function isEmpty(obj,msg)
{
	if (trim(obj.value)=='')
	{
		alert(msg);
		obj.value='';
		obj.focus();
		return false;
	}
return true;
}

function isSelected(obj,msg)
{
	if(obj.selectedIndex<=0)
	{
		alert(msg);
		obj.focus();
		return false;
	}
return true;
}

//Start Date Validation
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 isNum(s,obj,st){
	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")) && (c!=".") && (c!="-")) {
		setSp(obj,st);
		return false;
		}
    }
    // All characters are numbers.
    return true;
}

function isNumonly(s,obj,st){
	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"))) {
		setSp(obj,st);
		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,obj){
//alert(dtStr);
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	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");
		obj.focus();
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please Enter a Valid Month");
		obj.focus();
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please Enter a Valid Day");
		obj.focus();
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please Enter a Valid 4 Digit Year Between "+minYear+" and "+maxYear);
		obj.focus();
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please Enter a Valid Date");
		obj.focus();
		return false;
	}
return true
}
//End Date Validation

function isEmail(obj)
{
	var at="@"
	var dot="."
	var lat=obj.value.indexOf(at)
	var lstr=obj.value.length
	var ldot=obj.value.indexOf(dot)
	if (obj.value.indexOf(at)==-1){
		alert("Invalid E-mail ID")
		obj.focus();
		return false
	}

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

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

	 if (obj.value.indexOf(at,(lat+1))!=-1){
		alert("Invalid E-mail ID")
		obj.focus();
		return false
	 }

	 if (obj.value.substring(lat-1,lat)==dot || obj.value.substring(lat+1,lat+2)==dot){
		alert("Invalid E-mail ID")
		obj.focus();
		return false
	 }

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

	return true					
}

function isNumericOnEvent(evt)
{
	var charCode = (evt.which) ? evt.which : event.keyCode
	if ((charCode < 48 || charCode > 57) && charCode!=46)
		return false;
	return true;
}
function isNumeric(obj)
{
	if(isNaN(obj.value))
	{
		alert("Enter Numeric Value");
		obj.focus();
		return false;
	}
	return true;
}