/*
	- Authors: PD&D Web Based Training - David Scripps, Greg Damm
	- Date: 06.02.2005
	- Email: David.Scripps@target.com
	- Description: common javascript functions
*/
function toggle_visibility(tagID) {
 if( document.getElementById(tagID).style.display=='none' ){
   document.getElementById(tagID).style.display = '';
 }else{
   document.getElementById(tagID).style.display = 'none';
 }
}
function validateForm() {
	if(!isValidEmail(document.form1.emailaddress.value)) {
		alert("Please enter a valid email address.");
		return false;
	} else {
		return true;
	}
}
function isValidEmail(str) {
	//checks email address
   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);

}
function sf(){
	//puts the curson in the searchfield
	//document.menuform.searchField.focus();
}

function popUp(URL) {
	//creates popup window with specified URL
	day = new Date();
	id = day.getTime();
	eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=900px,height=500px');");
}
function customPopUp(URL, width, height) {
	//creates popup window with specified URL, width, and height
	day = new Date();
	id = day.getTime();
	eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=" + width + "px,height=" + height + "px');");
}
function post_value(inputField, postValue){
	//passes a variable from child to parent
	eval("opener.document.searchForm." + inputField).value = postValue;
	self.close();
}
function post_value_2(inputField1, postValue1, inputField2, postValue2){
	//passes 2 variables from child to parent
	eval("opener.document.searchForm." + inputField1).value = postValue1;
	eval("opener.document.searchForm." + inputField2).value = postValue2;
	//alert(postValue1 + " " + postValue2);
	self.close();
}
function qs() {
	//processes query string
	var qsParm = new Array();
	var query = window.location.search.substring(1);
	var parms = query.split('&');
	for (var i=0; i<parms.length; i++) {
		var pos = parms[i].indexOf('=');
		if (pos > 0) {
			var key = parms[i].substring(0,pos);
			var val = parms[i].substring(pos+1);
			qsParm[key] = val;
		}
	}
	return qsParm;
}
									   
									   
function gotoURL(URL) {
	//relocates to new url
	window.location=URL;
}

function onChange() {
	//jumps to page specified in the quick jump select box
	var Current = document.menuform.jumpmenu.selectedIndex;
	window.location.href = document.menuform.jumpmenu.options[Current].value;
}
function userDetect(checkItem) {
	//detects browser, version, or OS of user
	var detect = navigator.userAgent.toLowerCase();
	var OS,browser,version,total,thestring;
	
	if (checkIt('konqueror'))
	{
		browser = "Konqueror";
		OS = "Linux";
	}
	else if (checkIt('safari')) browser = "Safari"
	else if (checkIt('omniweb')) browser = "OmniWeb"
	else if (checkIt('opera')) browser = "Opera"
	else if (checkIt('webtv')) browser = "WebTV";
	else if (checkIt('icab')) browser = "iCab"
	else if (checkIt('msie')) browser = "Internet Explorer"
	else if (!checkIt('compatible'))
	{
		browser = "Netscape Navigator"
		version = detect.charAt(8);
	}
	else browser = "An unknown browser";
	
	if (!version) version = detect.charAt(place + thestring.length);
	
	if (!OS)
	{
		if (checkIt('linux')) OS = "Linux";
		else if (checkIt('x11')) OS = "Unix";
		else if (checkIt('mac')) OS = "Mac"
		else if (checkIt('win')) OS = "Windows"
		else OS = "an unknown operating system";
	}
	if(checkItem == "browser") return browser
	else if (checkItem == "version") return version
	else if (checkItem == "OS") return OS
	else return "Please specify 'browser', 'version', or 'OS'";
	function checkIt(string)
	{
		place = detect.indexOf(string) + 1;
		thestring = string;
		return place;
	}

}
//toggles the status of a list
var numLists = 0;
function toggle(image,list){
	var listElementStyle=document.getElementById(list).style;
	if (listElementStyle.display=="none") {
		listElementStyle.display="block";
		//alert(image);
		if(image) {
		document.getElementById(image).src="images/minus.gif";
		document.getElementById(image).alt="Close list";
		}
	} else {
		listElementStyle.display="none";           // collapse list
		if(image) {
		document.getElementById(image).src="images/plus.gif";
		document.getElementById(image).alt="Open list";
		}
	}
}
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}

function ValidateForm(fromDate,toDate){
	var dt=eval("document.searchForm." + fromDate)
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
	var dt=eval("document.searchForm." + toDate)
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
    return true
}