/*-----------------------------------------------------------------
Copyright © 1997-2006 MCART Group
-----------------------------------------------------------------*/
function chk(str) {
    if ((((str/str) != 1) && (str != 0)) || (str < 1)){
        alert('Please enter only a positive number into this box!');
        return false;
    }
}

function c(id) {
    document.form.update_id.value=id;
    document.form.submit();
}
function r(id) {
    document.form.remove_id.value=id;
    document.form.submit();
}
function a(id) {
    document.form.add_id.value=id;
    if(chk(document.form.add_id.value)) document.form.submit();
}
function u(value) {
    document.form.quantity.value=value;
}




function empty(x) {if (x.length > 0) return false; else return true;}
function stripspaces(x) { return x.replace(/^\W+/,''); }
function isblank(s) {
    for(var i=0; i< s.length; i++) {var c= s.charAt(i); if ((c != " ") && (c != "\n") && (c != "\t")) return false;}
    return true;
}