function rndimage() {
var Max_ligg = 4;
//var Max_ligg = max;
//alert(max);
var no = Math.floor(Math.random()*Max_ligg) + 1;
//var ext = ImgName.substring(ImgName.indexOf("."), ImgName.length);
var ext=".jpg"
//ImgName = ImgName.substring(0, ImgName.length-ext.length);
ImgName="top"
document.write("<img src=/design_images/slump/"+ImgName+no+ext+">");
}