if(navigator.appVersion.charAt(0) >= 3){
var img = new Array();
img[0]=new Image();img[0].src = "images/tab_01.gif";
img[1]=new Image();img[1].src = "images/tab_01_ro.gif";
img[2]=new Image();img[2].src = "images/tab_02.gif";
img[3]=new Image();img[3].src = "images/tab_02_ro.gif";
img[4]=new Image();img[4].src = "images/tab_03.gif";
img[5]=new Image();img[5].src = "images/tab_03_ro.gif";
img[6]=new Image();img[6].src = "images/tab_04.gif";
img[7]=new Image();img[7].src = "images/tab_04_ro.gif";
}
function change_image(nam,num){
if(navigator.appVersion.charAt(0) >= 3){
document.images[nam].src = img[num].src;
}
}