function get_random()
{
        var ranNum= Math.floor(Math.random()*5);
	return ranNum;
}


function show_image() {
	var whichImg=get_random();
	
	var img=new Array(5);
	img[0]="/images/headers/1.jpg";
	img[1]="/images/headers/2.jpg";
	img[2]="/images/headers/3.jpg";
	img[3]="/images/headers/4.jpg";
	img[4]="/images/headers/5.jpg";
	
	document.write("<img src='");
	document.write(img[whichImg]);
	document.write("' border='0' />");
}


function highlightAlt(){
    var theTable = document.getElementById("tablaZebra");
    var theTRs = theTable.getElementsByTagName("tr");
    for(var i = 0; i < theTRs.length; i += 2)   {
        var currTR = theTRs[i];

        //The space is here to set it off from any other
        //classes the tr might belong to
        currTR.className += " tablaAlt";
    }
 }