Used this. Also put it in a separate JS file so it would be global.
Code:
function validate_form(){
if (document.orderform[4].selectedIndex=='0')
{
alert('Please select whether you would like to use New Measurements or My Measurements.');
return false;
}
else if(document.orderform[4].selectedIndex=='1')
{
var elem = (document.orderform.elements);
var nelem = (elem.length*1) - (3*1);
for(var i = 0; i < nelem; i++)
{
if(document.orderform[i].type=='select-one')
{
if(document.orderform[i].selectedIndex=='0')
{
alert('Please select all options.');
return false;
}
}
}
}
else return true;
}