var img = new Array;

img[0] = "/wp-content/themes/webnist_01/common/img/base/main_img.jpg";
img[1] = "/wp-content/themes/webnist_01/common/img/base/main_img_02.jpg";
img[2] = "/wp-content/themes/webnist_01/common/img/base/main_img_03.jpg";
img[3] = "/wp-content/themes/webnist_01/common/img/base/main_img_04.jpg";
img[4] = "/wp-content/themes/webnist_01/common/img/base/main_img_05.jpg";
img[5] = "/wp-content/themes/webnist_01/common/img/base/main_img_06.jpg";
img[6] = "/wp-content/themes/webnist_01/common/img/base/main_img_07.jpg";
img[7] = "/wp-content/themes/webnist_01/common/img/base/main_img_08.jpg";
function main_img(){
        var i = myrandom(img.length) - 1;
        document.write("<img src=\""+img[i]+"\" alt=\"\" width=\"965\" height=\"385\" />");
}
function myrandom(max){
        var v = max * Math.random();
        if(v == 0.0){v = 1;}else{v = Math.ceil(v);}
        return v;
}