if (document.images) { 
	img1on=new Image();
  	img1on.src="images/nav_homeMO.jpg";
	img2on=new Image();
    img2on.src="images/nav_aboutMO.jpg";
    img3on=new Image();
    img3on.src="images/nav_inventoryMO.jpg";
    img4on=new Image();
    img4on.src="images/nav_salesMO.jpg";
    img5on=new Image();
    img5on.src="images/nav_testimonialMO.jpg";
    img6on=new Image();
    img6on.src="images/nav_resourcesMO.jpg";
    img7on=new Image();
    img7on.src="images/nav_contactMO.jpg";


    
    
    img1off=new Image();
  	img1off.src="images/nav_home.jpg";
	img2off=new Image();
    img2off.src="images/nav_about.jpg";
    img3off=new Image();
    img3off.src="images/nav_inventory.jpg";
    img4off=new Image();
    img4off.src="images/nav_sales.jpg";
    img5off=new Image();
    img5off.src="images/nav_testimonial.jpg";
    img6off=new Image();
    img6off.src="images/nav_resources.jpg";
    img7off=new Image();
    img7off.src="images/nav_contact.jpg";
		} 

function imgOn(imgName) { 
   if (document.images){ 
   document[imgName].src = eval(imgName + "on.src"); 
    } } 
function imgOff(imgName) { 
   if (document.images) { 
   document[imgName].src = eval(imgName + "off.src"); 
    } }




function floor(number){
	return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum(){
	var mi = document.main.InterestRate.value / 1200;
	var base = 1;
	var mbase = 1 + mi;

	for (i=0; i<document.main.YearsForMortgage.value * 12; i++){
		base = base * mbase
	}

	document.main.PI.value = floor(String(document.main.BorrowAmount.value).replace(/\D/g,'') * mi / ( 1 - (1/base)))
	document.main.MT.value = floor(document.main.AnnualPropTax.value / 12)
	document.main.MI.value = floor(document.main.AnnualInsurance.value / 12)

	var dasum = String(document.main.BorrowAmount.value).replace(/\D/g,'') * mi / ( 1 - (1/base)) +

	document.main.AnnualPropTax.value / 12 + 
	document.main.AnnualInsurance.value / 12;
	document.main.MP.value = floor(dasum);
}