a = 4 // a=numbers of banners
var slump = Math.random();
var talet = Math.round(slump * (a-1))+1;

function create() {

        this.width = ''
        this.height = ''
        this.src = ''
        this.href = ''
	this.border = ''
	this.alt = ''
	this.under = ''
}

b = new Array()
for(var i=1; i<=a; i++) { b[i] = new create() }


b[2].src    = "http://www.ccih.med.br/pratica_banner _novo.gif"
b[2].href   = "http://www.praticahospitalar.com.br"
b[2].width  = "426"
b[2].height = "80"
b[2].border = "1"
b[2].alt    = ""
b[2].under  = ''

b[3].src    = "http://www.ccih.med.br/ban-chat1.gif"
b[3].href   = "http://www.ccih.med.br/chat/chat.html"
b[3].width  = "468"
b[3].height = "60"
b[3].border = "1"
b[3].alt    = ""
b[3].under  = ''

b[4].src    = "http://www.ccih.med.br/ban-cqh.jpg"
b[4].href   = "http://www.apm.org.br/cqh"
b[4].width  = "468"
b[4].height = "60"
b[4].border = "1"
b[4].alt    = ""
b[4].under  = ''


var visa = "";

visa += '<a href="'+b[talet].href+'">'
visa += '<img src="'+b[talet].src+'" height='+b[talet].height
visa += ' width='+b[talet].width+' border='+b[talet].border+' alt='+b[talet].alt+'>';
visa += '</a>'

//-->