function randomLifeStyleImage(strImageName){
	var image_array=new Array(strImageName+'1.jpg',strImageName+'2.jpg',strImageName+'3.jpg');
	var selectedimage=Math.floor(Math.random()*image_array.length);
	selectedimage='/images/ww/main_image/'+image_array[selectedimage];
	document.getElementById('main-lifestyle').src=selectedimage;
}