function czysc(tekst){
    if(!tekst._haschanged){
       tekst.value=''
    };
    tekst._haschanged=true;
}

function PopUpWindow1(url, width, height) {
        var Win = window.open(url,"PopUpWindow1",'width=' + width + ',height=' + height + ',left=200,top=200,screenX=200,screenY=200,resizable=0,scrollbars=yes,menubar=no,titlebar=no' );
}
function PopUpWindow2(url, width, height) {
        var Win = window.open(url,"PopUpWindow2",'width=' + width + ',height=' + height + ',left=200,top=200,screenX=200,screenY=200,resizable=0,scrollbars=yes,menubar=no,titlebar=no' );
}