function i1_open()
{
    img1.width=200;
    img2.width=100;    

}
function i2_open()
{
    img1.width=100;
    img2.width=100;    

}
function i3_open()
{
    img1.width=100;
    img2.width=200;    

}
function i4_open()
{
    var today=new Date();
    t = today.getSeconds();    
    img1.width=100+t;
}
function i5_open()
{
    img1.width=100;
    img2.width=200;    

}