function roll (imgName, imgSrc) {
if (document.images) {
document[imgName].src = imgSrc;
return true;
}
}

function my_submit (formName) {
if (event.keyCode==13) {
document[formName].submit();
event.returnValue = false;
}
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}