// JavaScript Document
function checkForm(obj)
{
var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
var e =0;
var required = 0;
var error_email = 0;

	for(var i = 0;i < obj.length; i++)
	{
		if(obj[i].value == '' && obj[i].type == 'text')
		{
			document.getElementById('text_'+obj[i].name).style.color = 	"red";
			e++;
			required = 1;
			
		}
		else
		{
			if(obj[i].name == 'email' && !filter.test(obj[i].value))
			{
				document.getElementById('text_'+obj[i].name).style.color = "red";
				error_email = 1;
				e++;
			}
			else
			{
				document.getElementById('text_'+obj[i].name).style.color = "black";
			}
		}
	}
	
	if(required == 1)
	{
		document.getElementById('error_mes').style.display = "block";
		document.getElementById('error_mes').innerHTML = "Please input the required fields";
		return false;
	}
	else if(error_email == 1)
	{
		document.getElementById('error_mes').style.display = "block";
		document.getElementById('error_mes').innerHTML = "The email address is invalid!";
		return false;
	}
	
	if(e == 0)
	{	
		document.getElementById('error_mes').style.display = "none";
		document.getElementById('error_mes').innerHTML = "";
		obj.action="sendmail.php";
		obj.submit();	
	}
	else
	{	
		return false;
	}
}