function validateForm(strName, strEmail, strSubject, strMessage)
{
    var strErrors = '';
    if(strName.length==0)
    {
        strErrors += 'Please enter your name.\n';
    }
    if(strEmail.length==0 || !isValidEmail(strEmail))
    {
        strErrors += 'Please enter a valid email.\n';
    }
    if(strSubject.length==0)
    {
        strErrors += 'Please enter a subject.\n';
    }
    if(strMessage.length==0)
    {
        strErrors += 'Please enter a message.\n';
    }
    return strErrors;
}

function isValidEmail(strEmail)
{
	if(strEmail.length < 4)
	{return false;}
	else if(strEmail.indexOf('@') > 0)
	{
		if(strEmail.substring(strEmail.indexOf('@')).indexOf('.') > -1)
		{return true;}
		else
		{return false;}
	}
	else
	{return false;}
}

//remove html tags from message being sent...
function removeHTMLTags(strMessage){
 	var strStrippedText='';
 	if(strMessage.length>0){
 	 	strMessage = strMessage.replace(/&(lt|gt);/g, function (strMatch, p1){
 		 	return (p1 == 'lt')? '<' : '>';
 		});
 		var strStrippedText = strMessage.replace(/<\/?[^>]+(>|$)/g, '');	
 	}
 	return strStrippedText;
}