function CheckData() {
	var problem = 'No';
	if (document.information.sale_price.value.length <= 0) {
		alert ("Please enter a property sale price.");
		document.information.sale_price.focus();
		problem = 'Yes';	
	} else {
		var i = 0;
		var strField = document.information.sale_price.value;
		for (i = 0; i < strField.length; i++)
		if (strField.charAt(i) < '0' || strField.charAt(i) > '9') {
			alert ("Sale price must be a numeric entry. Please do not use commas OR pound signs.");
			document.information.sale_price.focus();
			problem = 'Yes';
		}
	}
	if (document.information.year_term.value.length <= 0) {
		alert ("Please enter the number of years the mortgage is for.");
		document.information.year_term.focus();
		problem = 'Yes';	
	}
	if (document.information.annual_interest_percent.value.length <= 0) {
		alert ("Please enter an interest rate.");
		document.information.annual_interest_percent.focus();
		problem = 'Yes';	
	} 
	if (problem == 'No') {
		return true;
	} else { 
		return false; 
	}
}