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

function validate(f){
var v,i,e
for(i=0;e=f[i++];)
  if(v=window[e.getAttribute('valid')])
   if(!v(e.value))
    {alert(e.getAttribute('alert'));e.focus();return 1}
}

function niepuste(x){
    return x>''
}

function ismail(e){
    return /^[\w\.-]{2,}@[\w\.-]+\.[a-z]{2,5}$/i.test(e)
}