Question

i cant understand why this simple function doesnt work in the way i want it to work 🙂

c = document.form.product_catid.selectedIndex;
if (document.form.product_name.value == "" && document.form.product_catid[c].value == "")
{
    alert ("Please, define at least product name or product category !");
    return false;
}
else if (!(document.form.product_name.value == "")) 
{
    return true;
}
else if (!(document.form.product_catid[c].value == "")) 
{
    return true;
}
else
{ 
    alert ("Please, dont define two of them at the same time!");
    return false; 
}
return true;

all i want is when input with name product_name is filled OR select with name product_catid is selected, the function is returned true, but if none of them or both are defined, i want it to alert two different alerts ) thank you all for the help, i really appreciate it!

Answer 1

Try debugging your case using Chrome Developer Tools, Firebug, or something similar. My suspicion is that you are trying to compare "" and undefined in the document.form.product_catid[c].value == "" clause (this will be the case when selectedIndex is -1). Try just !document.form.product_catid[c].value instead.