images = new Array
images[1] = "accounting-software.jpg"
images[2] = "banner2_bg.jpg"
images[3] = "banner3_bg.jpg"
images[4] = "banner4_bg.jpg"
	
function randomImages(){
	var randnum = Math.random();
	var num = images.length;
	var R = Math.round(randnum * (num-1)) + 1;
	
	if(document.getElementById('blogbanner')){
		if(R < num){
			randomImages=document.getElementById('blogbanner');
			randomImages.style.backgroundImage="url('_img/"+images[R]+"')";
		}else{
			randomImages=document.getElementById('blogbanner');
			randomImages.style.backgroundImage="url('_img/"+images[1]+"')";
		}
	}
}
window.onload = randomImages;