if (document.images)
{
pic1= new Image(153,110); 
pic1.src="http://behnaz.stel.net/bookcover/thumb/Par.jpg";
pic2= new Image(120,110); 
pic2.src="http://behnaz.stel.net/bookcover/thumb/Smoke.jpg";
pic3= new Image(154,110); 
pic3.src="http://behnaz.stel.net/bookcover/thumb/Taraneh.jpg";
}