var reWhitespace = /^\s+$/;
var reInteger = /^\d+$/;
var reFloat = /^((\d+(\.\d*)?)|((\d*\.)?\d+))$/;
var reEmail = /^.+\@.+\..+$/;

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

function isInteger (s)
{   
	
    return reInteger.test(s)
}

function contactvalidate()
{
		var s=document.contactform.emailaddress.value;
    	if(isEmpty(s) || reWhitespace.test(s))
		{
			alert("Please enter your email address.");
			document.contactform.emailaddress.focus();
			return false;
		}
		if(reEmail.test(s))
		{
		
		}
		else
		{
			alert("Please enter the valid format of email address");
			document.contactform.emailaddress.focus();
			return false;
		}
		var s1=document.contactform.comment.value;
		if(isEmpty(s1) || reWhitespace.test(s1))
		{
			alert("Please enter comment/message.");
			document.contactform.comment.focus();
			return false;
		}
		return true;
}

function emailalertvalidate()
{
		var s=document.emailalertform.emailaddress1.value;
    	if(isEmpty(s) || reWhitespace.test(s))
		{
			alert("Please enter your email address.");
			document.emailalertform.emailaddress1.focus();
			return false;
		}
		if(reEmail.test(s))
		{
		
		}
		else
		{
			alert("Please enter the valid format of email address");
			document.emailalertform.emailaddress1.focus();
			return false;
		}
		return true;
}

function eventvalidate1()
{
		var s=document.eventform.emailaddress.value;
    	if(isEmpty(s) || reWhitespace.test(s))
		{
			alert("Please enter your email address.");
			document.eventform.emailaddress.focus();
			return false;
		}
		if(reEmail.test(s))
		{
		
		}
		else
		{
			alert("Please enter the valid format of email address");
			document.eventform.emailaddress.focus();
			return false;
		}
		return true;
}