function changepage() {;
  var myurl=document.formname.select.options[document.formname.select.selectedIndex].value; ;
  location.href=myurl; 
}


//**********Email****************//
function emailCheck (emailStr) {
	/* The following pattern is used to check if the entered e-mail address
	   fits the user@domain format.  It also is used to separate the username
	   from the domain. */
var emailPat=/^(.+)@(.+)$/
	/* The following string represents the pattern for matching all special
	   characters.  We don't want to allow special characters in the address. 
	   These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	/* The following string represents the range of characters allowed in a 
	   username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
	/* The following pattern applies if the "user" is a quoted string (in
	   which case, there are no rules about which characters are allowed
	   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
	   is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
	/* The following pattern applies for domains that are IP addresses,
	   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
	   e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	/* The following string represents an atom (basically a series of
	   non-special characters.) */
var atom=validChars + '+'
	/* The following string represents one word in the typical username.
	   For example, in john.doe@somewhere.com, john and doe are words.
	   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
	// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	/* The following pattern describes the structure of a normal symbolic
	   domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


	/* Begin with the coarse pattern to simply break up user@domain into
	   different pieces that are easy to analyze. */
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
	  /* Too many/few @'s or something; basically, this address doesn't
	     even fit the general mould of a valid e-mail address. */
	alert("Email錯誤 (請檢查 @ 或 .)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

	// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
    alert("Email user name not correct.")
    return false
}

	/* if the e-mail address is at an IP address (as opposed to a symbolic
	   host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("IP address not correct!")
		return false
	    }
    }
    return true
}

	// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("Domain name not correct.")
    return false
}

	/* domain name seems valid, but now make sure that it ends in a
	   three-letter word (like com, edu, gov) or a two-letter word,
	   representing country (uk, nl), and that there's a hostname preceding 
	   the domain or country. */

	/* Now we need to break up the domain to get a count of how many atoms
	   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("EMail address must end in a two letter or three letter word.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="EMail格式錯誤!"
   alert(errStr)
   return false
}

return true;
}

//**********檢查日期****************//
var now = new Date();
var today = new Date(now.getYear(),now.getMonth(),now.getDate());
//**********檢查數字****************//
function check_Int(checkfield,fieldname,isEmptyOk)
{
    var newString = "";    
    var count = 0; 
    var checkString=checkfield.value;        
	if (isEmptyOk){
		if (checkString=="")return true;
	}
	
	if (!check_empty(checkfield,fieldname)){
		return false;
	}
	else{
		for (i = 0; i < checkString.length; i++){
	        	var ch = checkString.substring(i, i+1);
	        	if (ch >= "0" && ch <= "9"){
	        		newString += ch;
	        	}
	       }
	}
	
	if (checkString != newString){
		alert(fieldname+"一定是要數字!");
		checkfield.focus();
		return false;
	} else{
		return true;
	}
}
//**********檢查空白****************//
function check_empty(checkfield,fieldname)
{
    if(checkfield.value==""){
    	alert(fieldname+"不能空白!");
    	checkfield.focus();
    	return false ;
    }
    else {
    	return true ;
    }
}


//**********valid string , only allows a-z and 0-9****************//
function isProper(checkfield,fieldname) {
		var Str=checkfield.value
    if (Str.search(/^\w+( \w+)?$/) != -1)
        {return true;}
    else{
    	alert(fieldname + " can not include special characters!");
    	checkfield.focus();
        return false;
        }
	}