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"), "");
}

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

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

function isNumeric(obj,msg)
{
	if(isNaN(trim(obj.value)))
	{
		alert(msg);
		obj.value='';
		obj.focus();
		return false;
	}
	return true;
}

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;
}

//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!="-")) {
		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"))) {
		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);
	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 getObject(obj)
{
	var theObj;
	if(document.all)
	{
		if(typeof obj=="string")
		{
			return document.all(obj);
	    } 
		else
		{
			return obj.style;
	    }
	}
	if(document.getElementById)
	{
		if(typeof obj=="string")
		{
			return document.getElementById(obj);
	    }
		else
		{
			return obj.style;
	    }
	}
return null;
}

function numonly(evt)
{
	var charCode = (evt.which) ? evt.which:evt.keyCode;
	if(charCode>31 && (charCode<48 || charCode>57))
	{
		return false;
	}
	return true;
}

/**
*
*  Javascript string pad
*  http://www.webtoolkit.info/
*
**/
 
var STR_PAD_LEFT = 1;
var STR_PAD_RIGHT = 2;
var STR_PAD_BOTH = 3;
 
function pad(str, len, pad, dir) {
 
	if (typeof(len) == "undefined") { var len = 0; }
	if (typeof(pad) == "undefined") { var pad = ' '; }
	if (typeof(dir) == "undefined") { var dir = STR_PAD_RIGHT; }
 
	if (len + 1 >= str.length) {
 
		switch (dir){
 
			case STR_PAD_LEFT:
				str = Array(len + 1 - str.length).join(pad) + str;
			break;
 
			case STR_PAD_BOTH:
				var right = Math.ceil((padlen = len - str.length) / 2);
				var left = padlen - right;
				str = Array(left+1).join(pad) + str + Array(right+1).join(pad);
			break;
 
			default:
				str = str + Array(len + 1 - str.length).join(pad);
			break;
 
		} // switch
 
	}
 
	return str;
 
}