// Forms validation Javascript
//
// Version validation.jslib,v 1.11 2000/12/07 00:27:35 kobe Exp
//
// Works for: int, number, word, email, url, text (kind of), imageFile

// Check for missing fields that are required...

// Function setFormProps needs to be added by item.cgi


function validateField(field) {

	setFormProps(field.form);  // Very inefficient to stick this here, but I see no other way to 
				// ensure that it gets run before it is needed...

	if(field.checkFunction) { 
		if(!field.checkFunction(field.value)) {
			alert("Sorry, this field does not contain a valid "+field.data_type+".");
			field.select();
			field.focus();
			return(false);
		}
	}
}

var nomatch = 0;

function lockedField() {
	alert("Sorry, this field is locked.\nAny changes you make to it will not be saved.");
}


function validateForm(form) {
	setFormProps(form);

	blanks="";

	for (j=0;j<form.elements.length;j++) {
		e=form.elements[j];

		if (e.type!="text"&&e.type!="file"&&e.type!="password") continue;  // No error checking on non-text items
		if ((e.value==null)||(e.value=="")||(isBlank(e.value))) {   // Field is blank
			if (e.required) {                   // Is it required?
				blanks+="\n          "+e.field_name;
			}
			continue;  // No further checking on blank fields
		}

		if (e.checkFunction) {  // Has a checking function been defined in the properties area?
			if(!e.checkFunction(e.value)) {
				alert("Sorry, "+e.field_name+" does not contain a valid "+e.data_type+".");
				e.select();
				e.focus();
				return(false);
			}
		}
	}

	if (nomatch) { alert("Passwords don't match"); return(false);} // Stop if password didn't match
	if (!blanks) return(true);  // Form is OK!

	alert("Please correct the following error(s) and resubmit.\nThe following required(*) information is missing: "+blanks+"\n");

	return(false);
}

      
function isBlank(val) {
	for(i=0;i<val.length;i++) {
		c=val.charAt(i);
		if((c!=' ')&&(c!='\n')&&(c!='\t')) return(false);
	}
	return(true);
}

function strip(val) {  // Strips leading and trailing spaces from val
	while(val.indexOf(" ")==0) val=val.substring(1,val.length);
	while(val.lastIndexOf(" ")==val.length-1) val=val.substring(0,val.length-1);
	return(val);
}

// This one is still pretty crude
function isEmailAddress(val) {  // Returns true if val vaguely resembles an email address, false otherwise
	if (val.indexOf("@") == -1) return(false);
	else return(true);
}

function isFilename(val)
{
        var pos, ch;
        var platform, separator, version;
        if(val == null) return(false);

        platform = navigator.platform;
        version = parseInt(navigator.appVersion);
        
        if (platform.indexOf("Win") == 0) { separator = "\\";}
       
        else if (platform.indexOf("Mac") == 0) {
            var browser = navigator.appName;

                if (browser.indexOf("Micro") == 0) { separator = "%2F";}
                else if ((version >= 5 ) && ( browser.indexOf("Nets") == 0)) {separator = ":"; }
               	else { separator = "/";}
        } else { separator = "/";}
var seppos = val.lastIndexOf(separator);
	seppos++;

	for(pos = seppos; pos < val.length; pos++)
	{
		ch = val.charAt(pos);
		if(! (((ch >= 'A') && (ch <= 'Z')) ||
			((ch >= 'a') && (ch <= 'z')) ||
			((ch >= '0') && (ch <= '9')) ||
			((ch == '_') || (ch == '.') ||
			(ch == '-'))) ) { return(false); }
	}
	lcval=val.toLowerCase();

	if(lcval.length<=4) { return (false) }

	if(lcval.lastIndexOf(".zip") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".pdf") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".csv") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".txt") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".htm") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".doc") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".rtf") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".wav") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".mov") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".mpg") == lcval.length-4) { return(true) }	
	if(lcval.lastIndexOf(".mp3") == lcval.length-4) { return(true) }	
	if(lcval.lastIndexOf(".mer") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".xls") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".exe") == lcval.length-4) { return(true) }
	if(lcval.lastIndexOf(".html") == lcval.length-5) { return(true) }
	if(lcval.lastIndexOf(".zip") == lcval.length-5) { return(true) }
	return(false);
}

function isWord(val)
{
	var pos, ch;

	if(val == null)
		return(false);

	for(pos = 0; pos < val.length; pos++)
	{
		ch = val.charAt(pos);
		if(! (((ch >= 'A') && (ch <= 'Z')) ||
			((ch >= 'a') && (ch <= 'z')) ||
			((ch >= '0') && (ch <= '9')) ||
			((ch == '_') || (ch == '-'))) )
		{
			return(false);
		}
	}

	return(true);
}

function isPassword(val)
{
	var pos, ch;

	if(val == null)
		return(false);

	for(pos = 0; pos < val.length; pos++)
	{
		ch = val.charAt(pos);
		if(! (((ch >= 'A') && (ch <= 'Z')) ||
			((ch >= 'a') && (ch <= 'z')) ||
			((ch >= '0') && (ch <= '9')) ||
			((ch == '_') || (ch == '-'))) )
		{
			return(false);
		}
	}

	return(true);
}

function isText(val) {  // Returns true always
	return(true);
}

// This one is also still pretty crude
function isURL(val) {  // Returns true if val vaguely resembles a URL, false otherwise
	if (val.indexOf(".") == -1) return(false);
	else return(true);
}

function isInteger(val) {  // Returns true if val is an integer, false otherwise
	val=strip(val);  // Remove leading and trailing spaces that confuse the issue
	len = val.length;
	isInt = true;
  
	// This next bit lacks finesse, but is more strict than the implementation that relies
	// on a resolvable integer...  Probably closer to what we would want in practice
	// KNOWN BUG: Does not handle negative numbers properly...
  
	if (len==0) isInt=false;  // Field is empty
	else {
		for (i=0; i<len; i++) {
			d = val.charAt(i);
			if(!(d=="0"||d=="1"||d=="2"||d=="3"||d=="4"||d=="5"||d=="6"||d=="7"||d=="8"||d=="9")) {
				isInt=false;
				i=len;  // Short circuit search if we find a problem
			}
		}
	} 
	return(isInt);
}        

function isNumber(val) {
	parsed=parseFloat(val);
  
	if (isNaN(parseFloat(parsed))) { return(false);}
	else {   // This for Netscape 2 and IE 3
		if((parsed==0)&&(val!=0)) return(false);
		else return(true);
	}
}

 


function isImageFile(val) {

        var pos, ch;
        var platform, separator, version;
        if(val == null) return(false);

        platform = navigator.platform;
        version = parseInt(navigator.appVersion);
        
        if (platform.indexOf("Win") == 0) { separator = "\\";}
       
        else if (platform.indexOf("Mac") == 0) {
		var browser = navigator.appName;

                if (browser.indexOf("Micro") == 0) { separator = "%2F";}
                else if ((version >= 5 ) && ( browser.indexOf("Nets") == 0)) {separator = ":"; }
               	else { separator = "/";}
        } else { separator = "/";}
        var seppos = val.lastIndexOf(separator);
        seppos++;
        for(pos = seppos; pos < val.length; pos++)
        {
                ch = val.charAt(pos);
                if(! (((ch >= 'A') && (ch <= 'Z')) ||
                        ((ch >= 'a') && (ch <= 'z')) ||
                        ((ch >= '0') && (ch <= '9')) ||
                        ((ch == '_') || (ch == '.') ||
                        (ch == '-'))) )
                {
                        return(false);
                }
        }

        lcval=val.toLowerCase();

        if(lcval.length<=4) { return (false) }

        if(lcval.lastIndexOf(".gif") == lcval.length-4) { return(true) }
        if(lcval.lastIndexOf(".jpg") == lcval.length-4) { return(true) }
        if(lcval.lastIndexOf(".png") == lcval.length-4) { return(true) }

        if(lcval.length<=5) { return (false) }

        if(lcval.lastIndexOf(".jpeg") == lcval.length-5) { return(true) }

        return(false);
}

function checkPassword(field1,field2) {
	usingpasswords = 1;
	nomatch = 0;
	if (field1 == field2) {
		return(true);
        } else {
		nomatch = 1;
        	return(false);
        }
}

function editList(resource, listname, script)
{
	window.open(script+ '?ACTION=editlist&RESOURCE=' + resource + '&listname=' + listname,
		'EditList',
		'toolbar=no,location=no,directories=no,menubar=no,' +
		'scrollbars=yes,resizable=yes,width=640,height=400');
}

function openWin(url, width, height)
{
	window.open(url,
		'ViewFile',
		'toolbar=no,location=no,directories=no,menubar=no,' +
		'scrollbars=yes,resizable=yes,width=' + width + ',height=' + height);
}

/*
function get_player_reader(filetype)

{
	if (filetype == "mov")
	{
		document.write ('<a href="http://www.apple.com/quicktime">Download the Quicktime viewer</a>');
	}
	else if (filetype == "pdf")
	{
		document.write ('<a href="http://www.adobe.com">Download Adobe Acrobat</a>');
	}
	else if (filetype == "mpg")
	{
		document.write ('<a href="http://www.microsoft.com/downloads">Download Windows media player</a>');
	}
	else
	{
		return true;		
	}
}
*/