function verifyThis(){
	var	interestSelected = false;
	for (i=0; i < document.solar_preferences.interested_in.length; i++){ 
		if (document.solar_preferences.interested_in[i].checked) {		
			changeLocation(document.solar_preferences.interested_in[i].value);		
			interestSelected = true;
	  } 
    }
	if (!interestSelected) {
		alert("Please select one option");
	}
	
}//end verifyThis()

function changeLocation(destination){
	location.href=destination;
}