function over(){this.src=this.src.replace('0_md','1_md')}
function out(){this.src=this.src.replace('1_md','0_md')}
function vaxlator(){
for(i=0;i<(I=document.images).length;i++)
if(I[i].src.indexOf('0_md')>0){
    I[i].onmouseover=over;
    I[i].onmouseout=out;
    }
}

function pokaz(co){
document.getElementById(co).style.display = 'block';
}

function ukryj(co){
document.getElementById(co).style.display = 'none';
}