function mouseOver1()
{
document.getElementById("b1").src="images/land_sales_hover.jpg"
}
function mouseOut1()
{
document.getElementById("b1").src="images/land_sales.jpg"
}
function mouseOver2()
{
document.getElementById("b2").src="images/display_house_hover.jpg"
}
function mouseOut2()
{
document.getElementById("b2").src="images/display_house.jpg"
}
function mouseOver3()
{
document.getElementById("b3").src="images/wetlands_hover.jpg"
}
function mouseOut3()
{
document.getElementById("b3").src="images/wetlands.jpg"
}

function mouseOver4()
{
document.getElementById("b4").src="images/latest_releases_hover.jpg"
}
function mouseOut4()
{
document.getElementById("b4").src="images/latest_releases.jpg"
}

 
objImage1 = new Image();
 
objImage2 = new Image();
 
objImage3 = new Image();
function download(){
// preload the image file
objImage1.src='images/land_sales_hover.jpg';
objImage2.src='images/display_house_hover.jpg';
objImage3.src='images/wetlands_hover.jpg';
objImage4.src='images/latest_releases_hover.jpg';
}