function checkData_s1(){
	d=document.forms[0];
	if (((d.item1.value.length) && (d.item1_quantity.value.length)) || ((d.item2.value.length) && (d.item2_quantity.value.length)) || ((d.item3.value.length) && (d.item3_quantity.value.length)) || ((d.item4.value.length) && (d.item4_quantity.value.length)) || ((d.item5.value.length) && (d.item5_quantity.value.length)) || ((d.item6.value.length) && (d.item6_quantity.value.length)) || ((d.item7.value.length) && (d.item7_quantity.value.length)) || ((d.item8.value.length) && (d.item8_quantity.value.length)) || ((d.item9.value.length) && (d.item9_quantity.value.length)) || ((d.item10.value.length) && (d.item10_quantity.value.length))){
	} else {
		alert("Please enter both a quantity and type for at least one item");
		return false;
	}
}

function checkData_s2(){
	d=document.forms[0];
	if (d.customer_name.value.length ==0){
		d.customer_name.focus();
		alert("Please enter your name.");
		return false;
	}
	if (d.billing_address.value.length ==0){
		d.billing_address.focus();
		alert("Please enter your billing address.");
		return false;
	}
	if (d.billing_city.value.length ==0){
		d.billing_city.focus();
		alert("Please enter your city.");
		return false;
	}
	if (d.billing_state.value.length==0){
		d.billing_state.focus();
		alert("Please enter your state.");
		return false;
	}
	if (d.billing_zip.value.length ==0){
		d.billing_zip.focus();
		alert("Please enter your zip code.");
		return false;
	}
// Check for valid email
	if (d.email.value.length ==0){
		d.email.focus();
		alert("Please enter an e-mail address.");
		return false;
	}
	if (d.email.value.length >0){
		i=d.email.value.indexOf("@");
		j=d.email.value.indexOf(".",i);
		k=d.email.value.indexOf(",");
		kk=d.email.value.indexOf(" ");
		jj=d.email.value.lastIndexOf(".")+1;
		len=d.email.value.length;
		if ((i>0) && (j>(1+1)) && (k==-1) && (kk==-1) && (len-jj >=2) && (len-jj<=3)) {
		} else {
			d.email.focus();
			d.email.select();
			alert("Please enter an exact email address.\n" + d.email.value + " is invalid.");
			return false;
		}
	}
	if (d.billingmethod[0].checked){
		if (d.cc_name.value.length ==0){
			d.cc_name.focus();
			alert("Please enter a cardholder name.");
			return false;
	  	}
		if (d.cc_number.value.length ==0){
			d.cc_number.focus();
			alert("Please enter a credit card number.");
			return false;
		}
	} else if (d.billingmethod[1].checked){
		if (d.account_num.value.length ==0){
			d.account_num.focus();
			alert("Please enter an account number.");
			return false;
		}
		if (d.account_name.value.length ==0){
			d.account_name.focus();
			alert("Please enter an account name.");
			return false;
		}
		if (d.account_holder.value.length ==0){
			d.account_holder.focus();
			alert("Please enter an account holder.");
			return false;
		}
	} else {
		alert("Please select a billing method");
		return false;
	}
}

function checkData_s3(){
	d=document.forms[0];
	if (d.zone.value.length==0){
		d.zone.focus();
		alert("Please select a zone.");
		return false;
	}
	if (d.category.value.length==0){
		d.category.focus();
		alert("Please select a category.");
		return false;
	}
	if (d.subcategory.value.length==0){
		d.subcategory.focus();
		alert("Please select a subcategory.");
		return false;
	}
	if (d.startdate.value.length==0){
		d.startdate.focus();
		alert("Please select a start date for your ad.");
		return false;
	}
	if (d.startdate.value.length==0){
		d.startdate.focus();
		alert("Please select a startdate for your ad.");
		return false;
	}
	if (d.advert.value.length==0){
		d.advert.focus();
		alert("Please enter the text for your ad.");
		return false;
	}
}