function payment_enable(){
	if(document.getElementById('payment_label')){
		document.getElementById('payment_label').style.color="#000000";
	}
	if(document.getElementById('payment_min_label')){
		document.getElementById('payment_min_label').style.color="#000000";
	}
	if(document.getElementById('payment_max_label')){
		document.getElementById('payment_max_label').style.color="#000000";
	}
	if(document.getElementById('payment_interest_label')){
		document.getElementById('payment_interest_label').style.color="#000000";
	}
	if(document.getElementById('payment_down_label')){
		document.getElementById('payment_down_label').style.color="#000000";
	}
	if(document.getElementById('payment_months_label')){
		document.getElementById('payment_months_label').style.color="#000000";
	}
	if(document.getElementById('price_label')){
		document.getElementById('price_label').style.color="#aaaaaa";
	}
	if(document.getElementById('price_min_label')){
		document.getElementById('price_min_label').style.color="#aaaaaa";
	}
	if(document.getElementById('price_max_label')){
		document.getElementById('price_max_label').style.color="#aaaaaa";
	}

	document.forms['search'].max_price.disabled=true
	document.forms['search'].min_price.disabled=true
	document.forms['search'].min_payment.disabled=false
	document.forms['search'].max_payment.disabled=false
	document.forms['search'].interest.disabled=false
	document.forms['search'].downpayment.disabled=false
	document.forms['search'].payments.disabled=false
	document.forms['search'].max_price.selectedIndex=0
	document.forms['search'].min_price.selectedIndex=0
    }
    function price_enable(){
	document.getElementById('payment_label').style.color="#aaaaaa";
	document.getElementById('payment_min_label').style.color="#aaaaaa";
	document.getElementById('payment_max_label').style.color="#aaaaaa";
	document.getElementById('payment_interest_label').style.color="#aaaaaa";
	document.getElementById('payment_down_label').style.color="#aaaaaa";
	document.getElementById('payment_months_label').style.color="#aaaaaa";
	document.getElementById('price_label').style.color="#000000";
	document.getElementById('price_min_label').style.color="#000000";
	document.getElementById('price_max_label').style.color="#000000";
	document.forms['search'].max_price.disabled=false
	document.forms['search'].min_price.disabled=false
	document.forms['search'].min_payment.disabled=true
	document.forms['search'].max_payment.disabled=true
	document.forms['search'].interest.disabled=true
	document.forms['search'].downpayment.disabled=true
	document.forms['search'].payments.disabled=true
	document.forms['search'].min_payment.value=''
	document.forms['search'].max_payment.value=''


    }
	price_enable()


    function computeForm() {

	a = document.forms['calc'].min_payment.value;
			cleana = ""
			        for (var i = 0; i < a.length; i++) {
			            var ch = a.substring(i, i + 1)
			            if ((ch < "0" || "9" < ch) && ch != '.') {
			
			            }else{
					cleana = cleana + ch
				    }
				}
			a=cleana		
			i = document.forms['calc'].interest.options[document.forms['calc'].interest.selectedIndex].value/1200;

		n = 12*document.forms['calc'].payments.options[document.forms['calc'].payments.selectedIndex].value;
		min = Math.round((a*(Math.pow(1+i,n)-1))/(i*Math.pow(1+i,n)));

		a = document.forms['calc'].max_payment.value;
			cleana = ""
			        for (var i = 0; i < a.length; i++) {
			            var ch = a.substring(i, i + 1)
			            if ((ch < "0" || "9" < ch) && ch != '.') {
			
			            }else{
					cleana = cleana + ch
				    }
				}
			a=cleana
			i = document.forms['calc'].interest.options[document.forms['calc'].interest.selectedIndex].value/1200;
		
		max = Math.round((a*(Math.pow(1+i,n)-1))/(i*Math.pow(1+i,n)));

		a = document.forms['calc'].downpayment.value;
			cleana = ""
			        for (var i = 0; i < a.length; i++) {
			            var ch = a.substring(i, i + 1)
			            if ((ch < "0" || "9" < ch) && ch != '.') {
			
			            }else{
					cleana = cleana + ch
				    }
				}
			a=cleana
			max=eval(parseInt(max)+parseInt(a))
			min=eval(parseInt(min)+parseInt(a))
			window.location="results.php?min_price=" + min + "&max_price=" + max

}