function func_trim(param_text)
{
	var str_text=new String(param_text);
	var str_return_text;
	str_return_text="";
	b_non_blank_started=false;
	b_non_blank_ended=false;
	str_intermediate_blank_chunk="";
	var i_loop;
	for(i_loop=0;i_loop<str_text.length;i_loop++)
	{
		if(str_text.charCodeAt(i_loop)!=32)
		{
			if(!b_non_blank_started)
			{
				b_non_blank_started=true;
			}
			if(b_non_blank_started && !b_non_blank_ended)
			{
				str_return_text+=str_text.charAt(i_loop);
			}
			if(b_non_blank_ended)
			{
				str_return_text+=(str_intermediate_blank_chunk+str_text.charAt(i_loop));
				b_non_blank_ended=false;
				str_intermediate_blank_chunk="";
			}
		}
		else
		{
			if(b_non_blank_started)
			{
				b_non_blank_ended=true;
				str_intermediate_blank_chunk+=" ";
			}
		}
	}
	return str_return_text;
}// end trim()
		
function func_is_email(param_email)
{
	var str_current_character;
	var b_valid_email,b_period_present; 
	var i_last_position_of_period,b_correct_length_extension;
	var i_num_at_symbol=0;
	var i_pos_at_symbol;
	var i_length_of_server_name=1;
	var i_pos_consecutive_dots;
	var str_email=new String(func_trim(param_email));
	i_length=str_email.length;
	b_period_present=1;
	b_correct_length_extension=1;
	i_last_position_of_period=0;
	
	if(i_length==0)
	{
		return true;
	}
	
	for(i_loop=0; i_loop<i_length; i_loop++)
	{
		if(!((str_email.charCodeAt(i_loop)>=65 && str_email.charCodeAt(i_loop)<=90)
		  || (str_email.charCodeAt(i_loop)>=97 && str_email.charCodeAt(i_loop)<=122)
		  || (str_email.charCodeAt(i_loop)>=48 && str_email.charCodeAt(i_loop)<=57)
		  || (str_email.charAt(i_loop)=="@")
		  || (str_email.charAt(i_loop)=="_")
		  || (str_email.charAt(i_loop)=="-")
		  || (str_email.charAt(i_loop)==".")))
		{
			return false;
		}
	}
	
	i_pos_consecutive_dots=str_email.indexOf('..');
	if(i_pos_consecutive_dots!=-1)
	{
		return false;
	}
	
	var i_pos_space;
	i_pos_space = str_email.indexOf(' ');
	if(i_pos_space!=-1)
	{
		return false;
	}
	
	i_last_position_of_period = str_email.lastIndexOf('.');
	if(i_last_position_of_period<=0)
	{
		b_period_present=0;
	}
	
	if(((i_length-i_last_position_of_period)>4) || ((i_length-i_last_position_of_period)<3))
	{
		b_correct_length_extension=0;
	}
	
	for(i_loop=0;i_loop<=i_length;i_loop++)
	{
		str_current_character=str_email.charAt(i_loop);
		if (str_current_character=='@')
		{
			i_num_at_symbol=i_num_at_symbol + 1;
		}
	}
	
	if(i_num_at_symbol!=1)
	{
		return false;
	}
	
	i_pos_at_symbol = str_email.indexOf('@');
	if(str_email.charAt(i_pos_at_symbol+1) == '.')
	{
		i_length_of_server_name=0;
	}
	
	if((i_num_at_symbol==1) && (b_period_present==1) && (b_correct_length_extension==1) && (i_length_of_server_name==1))
	{
		b_valid_email=1;
	}
	else
	{
		 b_valid_email=0;
	}
	
	if(b_valid_email==0)
	{
		return false;
	}
	else
	{
		return true;
	}
}//end function func_is_email
		
		
function funcValidateForm(objForm)
{
	bReturn = true;
	var strName;
	var strEmail;
	strName 	= objForm.txtName.value;	//Retrieving the name field value
	strEmail 	= objForm.txtEmail.value;	//Retrieving the email field value
	strName 	= func_trim(strName); 		//Trimming the name
	strEmail 	= func_trim(strEmail);		//Trimming the email
	
	
	
	//Checking the name is null or not
	if(strName == "")
	{
		bReturn= false;
		alert("Please give name.");
		objForm.txtName.focus();
	}
	
	//Checking the email is null or not
	else if(strEmail == "")
	{
		bReturn= false;
		alert("Please give Email address.");
		objForm.txtEmail.focus();
	}
	//Checking the email is valid or not
	else if(!func_is_email(strEmail))
	{
		bReturn= false;
		alert("Please give a valid Email address.");
		objForm.txtEmail.focus();
	}
	

	//Checking agree checkbox is ticked or not
	if(objForm.agree != null)
	{
		if(!objForm.agree.checked)
		{
			alert('Please tick the checkbox to continue.');
			bReturn = false;
		}
	} 
	
	
	return bReturn;
}//end funcValidateForm