function randimages()
{
    var imgurl = 'images/';
    var extension = '.gif';
    var rand = Math.round(Math.random()*5)+1;
    var newimg = imgurl +"solu-" + rand + extension;
	var newhref = "product/solution/" +"solution-" + rand + ".html";
    document.getElementById("showimg").setAttribute("src",newimg);
	document.getElementById("showhref").setAttribute("href",newhref);
}
window.onload=function()
{
    randimages();
}