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I have built my own simple shopping cart using HTML form and PHP code. I have a mySQL database table of products with 3 databae felds – product name, product price and product type.
Customers can select multiple products to add to their shopping cart, and if one of the selected products has a special product type then an extra form field must be completed.
So when a customer selects products my PHP code selects all 3 product fields from the table and inputs the product type and product price to the shopping cart (i.e. stores them for later checkout) and I then store the product type in an array as a hidden form field e.g.
<input type=”hidden” name =”producttype[ ]” value=”value=”<?php echo $producttype; ?>””>
I then want to apply a javascript validation to ensure that the extra form field is selected whenever a slected product has a certin product type, something like this:
var producttype = theForm.elements[‘producttype[ ]’];
for (var i=0; i<producttype.length; i++) {
if (producttype[i] == “something”
&& theForm.extrafield.value == “”) {
alert(“Please enter Extra Field for selected Product.”);
theForm.extrafield.focus();
return (false);
}
}
However that has no affect and I cannot get it to work. My javascript skills are not that great, so can anyone see where I am going wrong here and help me out here please? Perhaps I have got it totally wrong??
Many thanks in advance!!