function check1()
{
var chk_string=registration.ser_num.value;

if(chk_string!="223")
{
alert("Please enter a valid Serial Number");
registration.ser_num.focus();
registration.ser_num.select();
return false;
}

return true;
}


/* function alphacheck1(field)
 {
 var alphaCount=0;
var sizechar=3;
var upass_string=registration.ser_num1.value;
var alph_valid="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

    for (var i=0; i<sizechar; i++) {
        if (alph_valid.indexOf(upass_string.charAt(i)) < 0) {
            alphaCount++
        }
    }
 if(alphaCount==upass_string.length){
 
registration.ser_num1.focus();
           
   }


 }*/


 function alphacheck1()
 {
var valid = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
var SHOW_ALERT = true;
 var _alpha = registration.ser_num1.value.search(/[a-z]|[A-Z]/);
  var _numer = registration.ser_num1.value.search(/\d/);
var ok = "yes";
var temp;
var temp1;
for (var i=0; i<registration.ser_num1.value.length; i++) {

temp = "" + registration.ser_num1.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if(registration.ser_num1.value.length<=2) ok = "no";
if (_alpha==-1)
  {
    if (SHOW_ALERT) alert("Please enter a valid Serial Number");
registration.ser_num1.select();
	return false;
  }
  if (_numer==-1)
  {
    if (SHOW_ALERT) alert("Please enter a valid Serial Number");
registration.ser_num1.select();
	return false;
  }
if (ok == "no") {

registration.ser_num1.focus();
alert("Please enter a valid Serial Number");
registration.ser_num1.select();
return false;

   }
  
		return true;

 }


 function alphacheck2()
 {
var valid = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
var SHOW_ALERT = true;
 var _alpha = registration.ser_num2.value.search(/[a-z]|[A-Z]/);
  var _numer = registration.ser_num2.value.search(/\d/);
var ok = "yes";
var temp;
for (var i=0; i<registration.ser_num2.value.length; i++) {

temp = "" + registration.ser_num2.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if(registration.ser_num2.value.length<=7) ok = "no";
if (_alpha==-1)
  {
    if (SHOW_ALERT) alert("Please enter a valid Serial Number");
registration.ser_num2.select();
	return false;
  }
  if (_numer==-1)
  {
    if (SHOW_ALERT) alert("Please enter a valid Serial Number");
registration.ser_num2.select();
	return false;
  }
if (ok == "no") {

registration.ser_num2.focus();
alert("Please enter a valid Serial Number");
registration.ser_num2.select();
return false;
   }
   
		return true;

 }
 

 

function handleEnter (field, event) {
		var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
		if (keyCode == 13) {
			var i;
			for (i = 0; i < field.form.elements.length; i++)
				if (field == field.form.elements[i])
					break;
			i = (i + 1) % field.form.elements.length;
			field.form.elements[i].focus();
			return false;
		} 
		else
		return true;
	}  
	





 /*function alphacheck2(field)
 {
 var alphaCount=0;
 var sizechar=8;
var upass_string=registration.ser_num2.value;
var alph_valid="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

    for (var i=0; i<sizechar; i++) {
        if (alph_valid.indexOf(upass_string.charAt(i)) < 0) {
            alphaCount++
        }
    }
 if(alphaCount==upass_string.length){
 
registration.ser_num2.focus();
registration.ser_num2.select();
            
   }


 }*/