function checkLocationForm(form){
	var alertme=0;
	var missing="You must complete all required fields:" + "\r\n";
	
 	for (var i=0;i<form.elements.length; i++){
		if(form.elements[i].value == ""){
			var dsp_len=0;
			try {
				dsp_len=form.elements[i].getAttribute("dsp").length;
			} catch (err) {}
			
			if(dsp_len>0){
				alertme=1;
				missing+="\r\n" + form.elements[i].getAttribute("dsp") ;
			}
		}
	}
	if(alertme==1){alert(missing); return false;}
	return true;
}

function checkRoleForm(form){
    if ( form.rolename.value == "" ) {
      alert( "You cannot create a role without providing its name!" );
      form.rolename.focus();
      return false ;
    } else {
      checkbox_choices = 0;
      forminputs = form.getElementsByTagName('input');
      for (i = 0; i < forminputs.length; i++) {
        if (forminputs[i].checked) {
          checkbox_choices = checkbox_choices + 1;
        }
      }
      if (checkbox_choices == 0 ) {
        alert( "Please select at least one permission for this role." );
        return false;
      }
      return true ;
    }
}

function checkUserForm ( form ) {
	var alertme=0;
	var missing="You must complete all required fields:" + "\r\n";
	
	var phone_missing=0;
	
 	for (var i=0;i<form.elements.length; i++){
		if(form.elements[i].value == ""){
			var dsp_len=0;
			try {
				dsp_len=form.elements[i].getAttribute("dsp").length;
			} catch (err) {}
			
			if(dsp_len>0){
				alertme=1;
				if(form.elements[i].getAttribute("dsp")=="Phone Number"){
					if(phone_missing==0){
						phone_missing=1;
						missing+="\r\n" + form.elements[i].getAttribute("dsp") ;
					}
				} else {
					missing+="\r\n" + form.elements[i].getAttribute("dsp") ;
				}
			}
		} 
		if((!validChars(form.elements[i].value)) && form.elements[i].name != "" && form.elements[i].name != null && form.elements[i].name != "submit"){
			alert(form.elements[i].getAttribute("dsp") + " contains invalid characters.");
			return false;
		}
	}	

	if(alertme==1){alert(missing); return false;}

	//email validation
	validemail=emailCheck(new String(form.email.value));
	if(validemail==false){return false;}
	
	//phone validation
	if(!isNumber(form.phone1.value) || !isNumber(form.phone2.value) || !isNumber(form.phone3.value)){return false;}
	
	if(form.password1.value!=form.password2.value){
		alert("Passwords do not match. Try again!");
		return false;
	}
	
	return true;
}

function isNumber(str){
	if (isNaN(parseInt(str))) { 
		return false;
	}
	return true;
}

function validChars(strng){
	// allow only letters, numbers, periods, @ and underscores
	strng=strng.replace(" ", "");
	var valid_chars=/[^a-zA-Z0-9@._\-\']/; //_.@-\
	if (!valid_chars.test(strng)) {return true;} // alert("valid -- " + strng);
	else {return false;} //alert("invalid -- " + strng);
}

function validLength(strng, min_len, max_len){
	if ((strng.length < min_len) || (strng.length > max_len)) {
	    return false;
	}
	return true;
}

function emailCheck (emailStr) {
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|c oop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	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) {
		alert("Please provide a valid email address.");
		return false;
	}

	var user=matchArray[1];
	var domain=matchArray[2];
	
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("Please provide a valid email address.");
			return false;
		}
	}
	
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("Please provide a valid email address.");
			return false;
		}
	}
	
	if (user.match(userPat)==null) {
		alert("Please provide a valid email address.");
		return false;
	}
	
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
			alert("Please provide a valid email address.");
			return false;
			}	
		}
		return true;
	}

	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			alert("Please provide a valid email address.");
			return false;
		}
	}
	
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("Please provide a valid email address.");
		return false;
	}

	if (len<2) {
		alert("Please provide a valid email address.");
		return false;
	}
	return true;
}

function isMoney (text) {
	var format = /^([0-9]+|[0-9]{1,3}(,[0-9]{3})*)(\.[0-9]{2})?$/;
	return format.test(text);
}

function isEmpty (text) {
	if (text == null || text.length == 0)
		return true;
	else
		return false;
}