//preload images
var image1=new Image()
image1.src="images/patientvideo_pic1.jpg"

var image2=new Image()
image2.src="images/patientvideo_pic2.jpg"

var image3=new Image()
image3.src="images/patientvideo_pic3.jpg"

//var image4=new Image()
//image4.src="images/patientvideo_pic4.jpg"