function clearError(id)
{
	document.getElementById(id).className="";
}

function validateContactUsForm()
{
	var valid=true;
	var errorMessage="";
	
	if(document.getElementById("contactname").value == "")
	{
		document.getElementById("contactname").className="redbg";
		errorMessage="You must enter your name<br />";
		valid=false;
	}

	if(!echeck(document.getElementById("contactemail").value))
	{
		document.getElementById("contactemail").className="redbg";
		errorMessage+="You must enter a valid email address<br />";
		valid=false;
	}
	
	if(document.getElementById("message").value == "")
	{
		document.getElementById("message").className="redbg";
		errorMessage+="You must enter a message<br />";
		valid=false;
	}
	
	document.getElementById("errormessage").innerHTML = errorMessage;
	
	return valid;

}

function echeck(str)
{
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1)
	{
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr)
	{
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)
	{
	    return false
	}

	 if (str.indexOf(at,(lat+1))!=-1)
	 {
	    return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot)
	 {
	    return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1)
	 {
	    return false
	 }
	
	 if (str.indexOf(" ")!=-1)
	 {
	    return false
	 }

 	 return true					
}