function preloadImages() {
                var d=document;
                if(d.images) {
                        if(!d._p) {
                                d._p = new Array();
                                var i,j=d._p.length,a=preloadImages.arguments;
                                for (i=0; i<a.length; i++) {
                                        if (a[i].indexOf("#")!=0) {
                                                d._p[j] = new Image;
                                                d._p[j++].src=a[i];
                                        }
                                }
                        }
                }
        }

function isAMac(){
	var str1=navigator.userAgent;
 	var ind=str1.indexOf("Mac");
 	var returnVal=0;
 	if (ind>=0) {
 		returnVal=1;
 	} 
	return returnVal;
}

function fontStyle(fontStyle,macSize,otherSize,fontColor,fontWeight){
	var brow=isAMac();
	var fontStr="<font style='font-family: ";
	fontStr=fontStr + fontStyle + "; ";
	if (brow == 1){
		fontStr=fontStr + "font-size: " + macSize + "; "; 
	}else{
	    fontStr=fontStr + "font-size: " + otherSize + "; "; 
	}
	fontStr=fontStr + "color: " + fontColor + "; ";
	fontStr=fontStr + "font-weight: " + fontWeight + ";'>";
	document.writeln(fontStr);
}


<!--- hide script from old browsers

if(document.images) {roll = 'true';}
else {roll = 'false';}

function msover2(img1,ref1,img2,ref2) { if (roll == 'true')
	{document.images[img1].src = ref1; document.images[img2].src = ref2; } }

function msout2(img1,ref1,img2,ref2) { if (roll == 'true')
	{document.images[img1].src = ref1; document.images[img2].src = ref2; } }

function msover1(img1,ref1) { if (roll == 'true')
	{document.images[img1].src = ref1; } }

function msout1(img1,ref1) { if (roll == 'true')
	{document.images[img1].src = ref1; } }

// preload images:                  
if (roll == 'true')
{
button1on = new Image(84,23);
button1on.src = "images/but_hom_02.jpg";
button2on = new Image(84,23);
button2on.src = "images/but_pro_02.jpg";
button3on = new Image(84,23);
button3on.src = "images/but_how_02.jpg";
button4on = new Image(84,23);
button4on.src = "images/but_con_02.jpg";

buttonroll1 = new Image(84,80)
buttonroll1.src="gfx/roll_hom.jpg"
buttonroll2 = new Image(84,80)
buttonroll2.src="gfx/roll_pro.jpg"
buttonroll3 = new Image(84,80)
buttonroll3.src="gfx/roll_how.jpg"
buttonroll4 = new Image(84,80)
buttonroll4.src="gfx/roll_con.jpg"
}

//end hiding --->