var Images = new Array() 



Images[0] = 'http://www.grantcom.us/assets/images/header1.jpg'

Images[1] = 'http://www.grantcom.us/assets/images/header2.jpg'

Images[2] = 'http://www.grantcom.us/assets/images/header3.jpg'

Images[3] = 'http://www.grantcom.us/assets/images/header4.jpg'

Images[4] = 'http://www.grantcom.us/assets/images/header5.jpg'

Images[5] = 'http://www.grantcom.us/assets/images/header6.jpg'

Images[6] = 'http://www.grantcom.us/assets/images/header7.jpg'



var j = 0

var p = Images.length;

var preBuffer = new Array()

for (i = 0; i < p; i++){

   preBuffer[i] = new Image()

   preBuffer[i].src = Images[i]

}

var whichImage = Math.round(Math.random()*(p-1));

function showImage(){

document.write('<img src="'+Images[whichImage]+'">');

}