/**
* DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
*/

//returns an error string, blank if fine
function ValidateEmailAddress(str) {

    var err = '';

    var at = "@";
    var dot = ".";
    var lat = str.indexOf(at);
    var lstr = str.length;
    var ldot = str.indexOf(dot);
    if (str.indexOf(at) == -1) {
        err = ("Invalid E-mail Address Format");
        return err;
    }

    if (str.indexOf(at) == -1 || str.indexOf(at) == 0 || str.indexOf(at) == lstr) {
        err = ("Invalid E-mail Address Format");
        return err;
    }

    if (str.indexOf(dot) == -1 || str.indexOf(dot) == 0 || str.indexOf(dot) == lstr) {
        err = ("Invalid E-mail Address Format");
        return err;
    }

    if (str.indexOf(at, (lat + 1)) != -1) {
        err = ("Invalid E-mail Address Format");
        return err;
    }

    if (str.substring(lat - 1, lat) == dot || str.substring(lat + 1, lat + 2) == dot) {
        err = ("Invalid E-mail Address Format");
        return err;
    }

    if (str.indexOf(dot, (lat + 2)) == -1) {
        err = ("Invalid E-mail Address Format");
        return err;
    }

    if (str.indexOf(" ") != -1) {
        err = ("Invalid E-mail Address Format");
        return err;
    }

    return err;
}


function imposeMaxLength(Object, MaxLen) {
    return (Object.value.length <= MaxLen);
}




/*********************************************************************
* No onMouseOut event if the mouse pointer hovers a child element 
* *** Please do not remove this header. ***
* This code is working on my IE7, IE6, FireFox, Opera and Safari
* 
* Usage: 
* <div onMouseOut="fixOnMouseOut(this, event, 'JavaScript Code');"> 
*		So many childs 
*	</div>
*
* @Author Hamid Alipour Codehead @ webmaster-forums.code-head.com		
**/
function is_child_of(parent, child) {
    if (child != null) {
        try {
            while (child.parentNode) {
                if ((child = child.parentNode) == parent) {
                    return true;
                }
            }
        } catch (e) {
            return false;
        }
    }
    return false;
}
function fixOnMouseOut(element, event, JavaScript_code) {
    var current_mouse_target = null;
    if (event.toElement) {
        current_mouse_target = event.toElement;
    } else if (event.relatedTarget) {
        current_mouse_target = event.relatedTarget;
    }
    if (!is_child_of(element, current_mouse_target) && element != current_mouse_target) {
        eval(JavaScript_code);
    }
}
/*********************************************************************/



/**
*
*  Javascript trim, ltrim, rtrim
*  http://www.webtoolkit.info/
*
**/

function trim(str) {
    return ltrim(rtrim(str, ' '), ' ');
}

function trim(str, chars) {
    return ltrim(rtrim(str, chars), chars);
}

function ltrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}

function rtrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}


/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
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
}

//note that this uses USA date format mm/dd/yyyy
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
}