function getanImage()
{
    var ranNum= Math.floor(Math.random()*5);

    var vImage = new Array(5)
     vImage[0]= "images/hp1.gif";
     vImage[1]= "images/hp3.gif"; 
     vImage[2]= "images/hpChillies.gif";
     vImage[3]= "images/hpCoriander.gif";
     vImage[4]= "images/hp5.gif";
      
document.varImage.src = vImage[ranNum]; 

}