function str_replace(busca, repla, orig)
{
    str 	= new String(orig);

    rExp	= "/"+busca+"/g";
    rExp	= eval(rExp);
    newS	= String(repla);

    str = new String(str.replace(rExp, newS));

    return str;
}
var processingPic = new Array();
var originalPic = new Array();
function replacePics()
{
    for(i = 0; i < originalPic.length; i++)
    {
        //alert(i);
        var imga = document.getElementById('btnSubmit'+i);
        //alert(imga.src);
        //alert(originalPic[i]);
        if(imga.src == originalPic[i]){
            //alert(\'changing to \'+processingPic[i]);
            imga.src = processingPic[i];
            //alert(\'b\');
            imga.disabled = true;
        } else {
            imga.src = originalPic[i];
            imga.disabled = false;
        }
    }
}