// Javascript Form Validation Functions 
// Written R Harmer
// Date 20 August 2207
/* Validate email address */
		function validate_email(field,alerttxt)
		{
		with (field)
		{
		apos=value.indexOf("@")
		dotpos=value.lastIndexOf(".")
		if (apos<1||dotpos-apos<2) 
			  {alert(alerttxt);
			  return (false);}
		else {return (true);}
		}
		}
/* Validate field required */
		function validate_required(field,alerttxt)
		{
		with (field)
		{
		if (value==null||value=="")
			{alert(alerttxt);
			return (false);}
		else {return (true);}
		}
		}
/* Create a popup window to display an image */
	function popitup(url) 
	{
		newwindow=window.open(url,'name','height=250,width=500');
		if (window.focus) {newwindow.focus()}
		return false;
	}
/* Create a popup window to display the throughabout image */
	function popitupl(url) 
	{
		newwindow=window.open(url,'name','height=700,width=550');
		if (window.focus) {newwindow.focus()}
		return false;
	}