Question

I am trying to validate a currency value in a shopping cart so that if it is less than $50 it hides the check out button. I have used the same script for min order units and it worked, but not for currency. Code below

<script type="text/javascript">
setTimeout ("checkout()", 10 );
function checkout() {
    var tu = document.getElementById('cost').innerHTML;
    if (tu < 50) {
        document.getElementById('buyvalidation').style.display='none';
        document.getElementById('no').style.display='block';
    } else {
        document.getElementById('buyvalidation').style.display='block';
    }
    setTimeout ( "checkout()", 10 );
}
</script>

Answer 1

What is the value of tu?

If it has $ and ,, you should strip those out.

if( tu.replace(/[$,]/g, '') < 50 ) {...

Although it is probably better practice to have a related hidden field that just has the number without any decorations.​