var link_path  = "";

// Function that return a number between 0 and "nums - 1"
function getRandom(nums)
{
    var ranNum= Math.round(Math.random()*nums);
    return ranNum;
}

// Tells us how many images we have available.
var numberOfImages = 3;
var randomNumber = getRandom(numberOfImages);

// Create an array to hold the names of all images.
var image = new Array(numberOfImages);
image[0]= link_path+"images/random/image1.jpg";
image[1]= link_path+"images/random/image2.jpg";
image[2]= link_path+"images/random/image3.jpg";   
image[3]= link_path+"images/random/image4.jpg";


function getRandom_sum(nums_sum)
{
    var ranNum_sum= Math.round(Math.random()*nums_sum);
    return ranNum_sum;
}

// Tells us how many images we have available.
var numberOfImages_sum = 3;
var randomNumber_sum = getRandom_sum(numberOfImages_sum);

// Create an array to hold the names of all images.
var sum_image = new Array(numberOfImages_sum);
sum_image[0]= link_path+"images/random/sum_image1.jpg";
sum_image[1]= link_path+"images/random/sum_image2.jpg";
sum_image[2]= link_path+"images/random/sum_image3.jpg";   
sum_image[3]= link_path+"images/random/sum_image4.jpg";