function validate()
{
	var fromId				=	document.getElementById("fromId");	
	var product				=	document.getElementById("product");
	var dayCode				=	document.getElementById("dayCode");
	var dayNumber			=	document.getElementById("dayNumber");
	var subject				=	document.getElementById("subject123");
	var message				=	document.getElementById("message");

	if(fromId.value.length == 0 || fromId.value.length > 50){
		alert('Please enter the E-mail ID');
		fromId.focus();
		fromId.select();
		return false;
	 }	
	if(isEmail(fromId.value)==false){
		alert('Please Enter a Valid Email ID');
		fromId.focus();
		fromId.select();
		return false;
	}
	if((product.value=="selected")){
		alert('Please Select an Option');
		product.focus();
		return false;
	}

	if((dayCode.value.length > 0)){
		if(isInteger(dayCode.value) == false){
    	alert("Please enter valid STD Code");
		dayCode.focus();
		dayCode.select();
		return false;
		}
	if(dayCode.value.length > 5){
    	alert("STD Code cannot be greater than 5 digits");
		dayCode.focus();
		dayCode.select();
		return false;
		}
	}
	if((dayNumber.value.length > 0)){
		if(isInteger(dayNumber.value) == false){
    	alert("Please enter valid Phone Number");
		dayNumber.focus();
		dayNumber.select();
		return false;
		}
	if(dayNumber.value.length > 10){
    	alert("Phone Number cannot be greater than 10 digits");
		dayNumber.focus();
		dayNumber.select();
		return false;
		}
	}
	if(subject.value.length == 0 ){
		alert('Please enter the Subject');
		subject.focus();
		subject.select();
		return false;
	 }
	 if(subject.value.length > 100 ){
		alert('Subject cannot be greater than 100 Characters');
		subject.focus();
		subject.select();
		return false;
	 }
	 if(message.value.length == 0 ){
		alert('Please enter the Message');
		message.focus();
		message.select();
		return false;
	 }
	 if(message.value.length > 4000 ){
		alert('Message cannot be greater than 4000 Characters');
		message.focus();
		message.select();
		return false;
	 }
}

//******Regular expression starts here****//


//VALIDATION FOR CHECK NAMES

var reAlphabetic = /^[a-zA-Z]+$/
var defaultEmptyOK = false

function isEmpty(s){ 
	return ((s == null) || (s.length == 0))
}

function isAlphabetic(s){  
	var i;
    if (isEmpty(s)) 
       if (isAlphabetic.arguments.length == 1) return defaultEmptyOK;
       else return (isAlphabetic.arguments[1] == true);
    else {
       return reAlphabetic.test(s)
    }
}


//VALIDATION FOR CHECK E-MAIL
var reEmail = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/
function isEmail(s){  
	if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);
    else {
       return reEmail.test(s)
    }
}

//VALIDATION FOR LOGIN ID
function isLogin(s){
    var alphanum=/^[a-zA-Z0-9]+$/;

	if (isEmpty(s)) 
       if (isLogin.arguments.length == 1) return defaultEmptyOK;
       else return (isLogin.arguments[1] == true);
    
    else {
       return alphanum.test(s)
    }
}

//VALIDATION FOR NUMBER
var reInteger = /^\d+$/
function isInteger(s){
	var i;
    if (isEmpty(s)) 
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);

    return reInteger.test(s)
}



//VALIDATION FOR CHECK DATE NOT LESS THAN CURRECT DATE

function isLessThenCurrentDate(dateStr)
{
	
	var mydate=new Date(commonServerDate.getFullYear(), commonServerDate.getMonth(), commonServerDate.getDate());
var a1=new Array();
a1=dateStr.split("/");
var userdate=new Date(a1[2],a1[1]-1,a1[0]);
var one_day=1000*60*60*24
var noOfDays=Math.ceil((mydate.getTime()-userdate.getTime())/(one_day));

if(noOfDays<=0){
		  
			
return false;
}
return true;
}


/**
 * DHTML date validation script for dd/mm/yyyy. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isIntegers(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 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){
		alert("Please enter your Date of Birth (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 || isIntegers(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}

//VALIDATION FOR ALPHANUMERIC
function isAlphaNumeric(val)
{
if (val.match(/^[a-zA-Z0-9]+$/))
{
return true;
}
else
{
return false;
} 
}