function isblank(s) {
				for(var i = 0; i < s.length; i++) {
					var c = s.charAt(i);
					if((c != ' ') && (c != '')) return false;
				}
				return true;
			}
			
			function check_and_change() {
				var namefilled = 0;
				var numberfilled = 0;
				var namecharge = "12.50";
				var numbercharge = "12.50";
				var nameandnumbercharge = "25.00";				
				if(!(isblank(document.getElementById("MX06M20120910custname").value))) {
					namefilled = 1;
				}
				else {
					document.getElementById("MX06M20120910custname").value = "";
				}
				if(!(isblank(document.getElementById("MX06M20120910custnumber").value))) {
					numberfilled = 1;
				}
				else {
					document.getElementById("MX06M20120910custnumber").value = "";
				}
				if((namefilled == 1) && (numberfilled == 1)) {
					valueadd = "Name and Number (+$" + nameandnumbercharge + ")";
				}
				else if (namefilled == 1) {
					valueadd = "Name (+$" + namecharge + ")";
				}
				else if (numberfilled = 1) {
					valueadd = "Number (+$" + numbercharge + ")";
				}
				else {
					valueadd = "None";
				}
				document.getElementById("MX06M20120910custprice").value = valueadd;
				return true;
			}
			
	
document.write('<select name="Size"><option>Large</option><option>X-Large</option></select><br><br><span class="custom-addon">Add a Custom Name, 0 letters max<br>(Add $12.50) </span><input id="MX06M20120910custname" name="vw-inscription-custname" maxlength="0" size="0" onChange="check_and_change()"><br><br><span class="custom-addon">Add a Custom Number, 2 digits max<br>(Add $12.50) </span><input id="MX06M20120910custnumber" name="vw-inscription-custnum" maxlength="2" size="2" onChange="check_and_change()"><input type="hidden" id="MX06M20120910custprice" name="Custom Price" value="None"></div>')