// JavaScript Document

function MM_validateForm() { //v4.0
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name; if ((val=val.value)!="") {
        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
          if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
        } else if (test!='R') { num = parseFloat(val);
          if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
            min=test.substring(8,p); max=test.substring(p+1);
            if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
    } if (errors) alert('The following error(s) occurred:\n'+errors);
    document.MM_returnValue = (errors == '');
} }

function changeProduct(product){
	
	if(product == "bulk"){
		
		//update hidden fields
		document.getElementById("hosted_button_id").value = '204673'; //paypal
		document.getElementById("Amt").value = '79.90'; //order total
		document.getElementById("ProdDescription").value = 'W2';

		//hide layers
		MM_changeProp('offer_2_over','','display','none');
		MM_changeProp('offer_2_total','','display','none');
		
		//show layers
		MM_changeProp('offer_1_over','','display','block');
		MM_changeProp('offer_1_total','','display','block');
	} 
	else if(product == "single"){
		
		//update hidden fields
		document.getElementById("hosted_button_id").value = '204646'; //paypal
		document.getElementById("Amt").value = '45.90'; //order total
		document.getElementById("ProdDescription").value = 'W1';
		
		//hide layers
		MM_changeProp('offer_1_over','','display','none');
		MM_changeProp('offer_1_total','','display','none');
		
		//show layers
		MM_changeProp('offer_2_over','','display','block');
		MM_changeProp('offer_2_total','','display','block');
		
	}
}