// JavaScript Document-- Done by kuntalC
function trim(str){
	return str.replace(/^\s+|\s+$/g,'');
}
function communicate(){
	if(trim(document.getElementById('sender_name').value) == ""){
		alert("Please enter Your Name!");
		document.getElementById('sender_name').focus();
		return false;
	}else if(trim(document.getElementById('sender_email').value) == ""){
		alert("Please enter Your Email Address!");
		document.getElementById('sender_email').focus();
		return false;
	}else if(trim(document.getElementById('subject').value) == ""){
		alert("Please enter Subject!");
		document.getElementById('subject').focus();
		return false;
	}else if(trim(document.getElementById('msg').value) == ""){
		alert("Please enter Message!");
		document.getElementById('msg').focus();
		return false;
	}else if(trim(document.getElementById('txtCaptcha').value) == ""){
		alert("Please enter the Security Code!");
		document.getElementById('txtCaptcha').focus();
		return false;
	}else{
		if(email_validate(document.getElementById('sender_email').value)!=false)
			return "ok";
		else{
			alert("Email address must be in proper format");
			document.getElementById('sender_email').focus();
			return false;
		}
	}
}
function checkContactForm(){
	if(trim(document.getElementById('fname').value) == ""){
		alert("Please Enter Your First Name!");
		document.getElementById('fname').focus();
		return false;
	}else if(trim(document.getElementById('lname').value) == ""){
		alert("Please Enter Your Last Name!");
		document.getElementById('lname').focus();
		return false;
	}else if(trim(document.getElementById('phone').value) == ""){
		alert("Please Enter Your Contact Number!");
		document.getElementById('phone').focus();
		return false;
	}else if(trim(document.getElementById('emailadd').value) == ""){
		alert("Please Enter Your Email Address!");
		document.getElementById('emailadd').focus();
		return false;
	}else if(trim(document.getElementById('subject').value) == ""){
		alert("Please Enter Message Subject!");
		document.getElementById('subject').focus();
		return false;
	}else if(trim(document.getElementById('comments').value) == ""){
		alert("Please Enter Message!");
		document.getElementById('comments').focus();
		return false;
	}else if(trim(document.getElementById('txtCaptcha').value) == ""){
		alert("Please Enter the Security Code!");
		document.getElementById('txtCaptcha').focus();
		return false;
	}else{
		if(email_validate(document.getElementById('emailadd').value)!=false)
			return "ok";
		else{
			alert("Email address must be in proper format");
			document.getElementById('emailadd').focus();
			return false;
		}
	}	
}
function email_validate(emailid){
	var x = emailid;
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (filter.test(x))
		{

		}
		else
			return false;
}
<!--
/****************************************************
     Author: Eric King
     Url: http://redrival.com/eak/index.shtml
     This script is free to use as long as this info is left in
     Featured on Dynamic Drive script library (http://www.dynamicdrive.com)
****************************************************/
var win=null;
function generatePopUp(mypage,myname,w,h,scroll,pos){
if(pos=="random"){LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
if(pos=="center"){LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;}
else if((pos!="center" && pos!="random") || pos==null){LeftPosition=0;TopPosition=20}
settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=yes,menubar=no,toolbar=no,resizable=yes';
win=window.open(mypage,myname,settings);	
}
// -->
<!-- Script by hscripts.com -->
var count=2000;
function limiter(){
var tex = document.frm.msg.value;
var len = tex.length;
if(len > count){
        tex = tex.substring(0,count);
        document.frm.msg.value =tex;
        return false;
}
document.frm.limit.value = count-len;
}
function limiter_internal_form(){
var tex = document.frm.comments.value;
var len = tex.length;
if(len > count){
        tex = tex.substring(0,count);
        document.frm.comments.value =tex;
        return false;
}
document.frm.limit.value = count-len;
}