function e_friend()
	{
	var e_add = "Enter you email address here";
	var url = "http://www.directhygiene.org/online_calculator.htm"+"#q1="+document.cal.air_qty.value+",q2="+document.cal.ur_qty.value+",q3="+document.cal.hd_qty.value+",p1="+document.cal.air_cost.value+",p2="+document.cal.ur_cost.value+",p3="+document.cal.hd_cost.value;
	var subj= "Have a look this website ";	
	//alert(url);
	
	if ((subj==" ") || (subj==null))
	subj="Hi!";
	window.location ="mailto:"+e_add+"?subject="+subj+"&body=I thought you might be interested in having a look at this website: "+url+" .\n";
	}