function f_calc()
{
var s="";
if(document.frmMain.rate.value=="") { 
	s="Please enter the annual interest rate";
	document.frmMain.rate.focus();	
	}
if(document.frmMain.term.value=="") {
	s="Please enter the loan term";
	document.frmMain.term.focus();	
	}
if(document.frmMain.tax.value=="") {
	s="Please enter the tax";
	document.frmMain.tax.focus();	
	}
if(document.frmMain.hi.value=="") {
	s="Please enter the homeowner's insurance";
	document.frmMain.hi.focus();	
	}
if(document.frmMain.agi.value=="") {
	s="Please enter your annual gross income";
	document.frmMain.agi.focus();	
	}
if(document.frmMain.debt.value=="") {
	s="Please enter your debt";
	document.frmMain.debt.focus();	
	}
if(s!="") {
	alert(s);
	return(0)
	}
document.frmMain.submit();
}

function f_open()
{
url = "help_calc_afford.php";
ttl = "";
w=0;h=0;
showpane_custom(url,ttl,w,h) 
}