// Trim whitespace from left and right sides of s.
function trim(s) {
    return s.replace( /^\s*/, "" ).replace( /\s*$/, "" );
}
            
function validateEmail(form) {
    var bValid = true;
    var focusField = null;
    var i = 0;
    var fields = new Array();
    oEmail = new email();
    for (x in oEmail) {
        if ((form[oEmail[x][0]].type == 'text' ||
             form[oEmail[x][0]].type == 'textarea') &&
            (form[oEmail[x][0]].value.length > 0)) {
            if (!checkEmail(form[oEmail[x][0]].value)) {
                if (i == 0) {
                    focusField = form[oEmail[x][0]];
                }
                fields[i++] = oEmail[x][1];
                bValid = false;
            }
        }
    }
    if (fields.length > 0) {
        focusField.focus();
        alert(fields.join('\n'));
    }
    return bValid;
}

/**
 * Reference: Sandeep V. Tamhankar (stamhankar@hotmail.com),
 * http://javascript.internet.com
 */
function checkEmail(emailStr) {
   if (emailStr.length == 0) {
       return true;
   }
   var emailPat=/^(.+)@(.+)$/;
   var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
   var validChars="\[^\\s" + specialChars + "\]";
   var quotedUser="(\"[^\"]*\")";
   var ipDomainPat=/^(\d{1,3})[.](\d{1,3})[.](\d{1,3})[.](\d{1,3})$/;
   var atom=validChars + '+';
   var word="(" + atom + "|" + quotedUser + ")";
   var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
   var domainPat=new RegExp("^" + atom + "(\\." + atom + ")*$");
   var matchArray=emailStr.match(emailPat);
   if (matchArray == null) {
       return false;
   }
   var user=matchArray[1];
   var domain=matchArray[2];
   if (user.match(userPat) == null) {
       return false;
   }
   var IPArray = domain.match(ipDomainPat);
   if (IPArray != null) {
       for (var i = 1; i <= 4; i++) {
          if (IPArray[i] > 255) {
             return false;
          }
       }
       return true;
   }
   var domainArray=domain.match(domainPat);
   if (domainArray == null) {
       return false;
   }
   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)) {
       return false;
   }
   if (len < 2) {
       return false;
   }
   return true;
}

//pop-up window for help and about us
function popsmall(URL){
var newwindow = window.open(URL,'_blank','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,width=640,height=480,top=150,left=150')
newwindow.focus();
}

//pop-up window for help and about us
function popsmallscroll(URL){
var newwindow = window.open(URL,'_blank','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=640,height=480,top=150,left=150');
newwindow.focus();
}

function popsmallscroll(URL, windowname) {
var newwindow = window.open(URL,windowname,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=640,height=480,top=150,left=150')
newwindow.focus();
}

function popnormal(URL,windowname) {
var newwindow = window.open(URL,windowname);
newwindow.focus();
}

function checkAll(checkboxes, checked) {
	if (checkboxes) {
		if (checkboxes.length) {
			for (var i=0; i<checkboxes.length; i++) {
				checkboxes[i].checked = checked;
			}
		} else {
			checkboxes.checked = checked;
		}
	}
}