var tags = new Array( 'div','p','b','cp','font');
var pixelArray =  new Array('9','10','11','12','13','14','15');
var emArray =  new Array('0.7','0.9','1.0','1.5','2.0','2.5','3');
var initSize = 3;

function fontSizer(inc,unit) {
	
	if (!document.getElementById) 
		return;
	var size = initSize;
		size += inc;
	if (size < 0 ) {
		size = 0;
}
	if (size > 6 ) {
		size = 6;
}
		initSize = size;
		getBody = document.getElementsByTagName('body')[0];
	for (i = 0 ; i < tags.length ; i++ ) {
		getallTags = getBody.getElementsByTagName(tags[i]);
	for (k = 0 ; k < getallTags.length ; k++) 
		getallTags[k].style.fontSize = (unit=='px') ? pixelArray[size]+unit: emArray[size]+unit;
	}
}




var backImage = new Array(); // don't change this

backImage[0] = "Images/sky.jpg";
backImage[1] = "Images/red.jpg";
backImage[2] = "Images/blue.jpg";
backImage[3] = "";

function changeBGImage(whichImage){
if (document.body){
document.body.background = backImage[whichImage];

}
}