function wopen(url, name, height, width, str1) {
       var str = "height=" + height + ",innerHeight=" + height;
       str += ",width=" + width + ",innerWidth=" + width;
	   
	   str += ", "+str1;
	   
	   
       if (window.screen) {
         var ah = screen.availHeight - 30;
         var aw = screen.availWidth - 10;

         var xc = (aw - width) / 2;
         var yc = (ah - height) / 2;

         str += ",left=" + xc + ",screenX=" + xc;
         str += ",top=" + yc + ",screenY=" + yc;
       }
       var win=window.open(url, name, str);
	   win.focus();
	   return win;
}	 

function switch_img(name)
{
document.all.image.innerHTML="<img src='./userdata/"+name+"'>";	
}

function swap_image(image_ptr,name)
{
image_ptr.src="./userdata/images/"+name;
}