function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) alert('The following error(s) occurred:\n'+errors);
  document.MM_returnValue = (errors == '');
}

function cOn(tr){
tr.style.backgroundColor="#669ABC";
}
function cOut(tr){
tr.style.backgroundColor="#A8C7DB";
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}


var submitRolls = new Object();
function submitroll(src, oversrc, name)
{
	this.src=src;
	this.oversrc=oversrc;
	this.name=name;
	this.alt="Submit Query";
	this.write=submitroll_write;
}
function submitroll_write()
{
	var thisform = 'document.forms[' + (document.forms.length - 1) + ']';
	submitRolls[this.name] = new Object();
	submitRolls[this.name].over = new Image();
	submitRolls[this.name].over.src = this.oversrc;
	submitRolls[this.name].out = new Image();
	submitRolls[this.name].out.src = this.src;
	document.write
		(
		'<A onMouseOver="if (document.images)document.images[\'' + this.name + "'].src=submitRolls['" + this.name + '\'].over.src"' + 
		' onMouseOut="if (document.images)document.images[\'' + this.name + "'].src=submitRolls['" + this.name + '\'].out.src"' + 
		' HREF="javascript:'
		);
	if (this.sendfield)
		{
		if (! this.sendvalue)
	 this.sendvalue = 1;
		document.write(thisform, ".elements['", this.sendfield, "'].value='", this.sendvalue, "';");
		}
	document.write(thisform + '.submit();void(0);"');
	if (this.msg)document.write(' onClick="return confirm(\'' , this.msg, '\')"');
	document.write('>');
	document.write('<IMG SRC="' + this.src + '" ALT="' + this.alt + '" BORDER=0 NAME="' + this.name + '"');
	if (this.height)document.write(' HEIGHT=' + this.height);
	if (this.width)document.write(' WIDTH=' + this.width);
	if (this.otheratts)document.write(' ' + this.otheratts);
	document.write('></A>');
	if (this.sendfield)
		{
		document.write('<INPUT TYPE=HIDDEN NAME="' + this.sendfield + '">');
		document.forms[document.forms.length - 1].elements[this.sendfield].value='';
		}
}


//remove the front and back spaces of the given string
function stripSpace(str){ 
   //remove the front white space
    for (var i = 0; i < str.length; i++){
       if (str.charAt(i) !=' '){ break;}  
     }
    var s = str.substring(i, str.length);

   //remove the back white space
    for (var j = s.length - 1; j >= 0; j--){ 
       if (s.charAt(j) != ' '){ break;}
    }
   return s.substring(0, j+1); 
}



//check if the field value is empty
function isEmptyField(fieldId){
	var field = document.getElementById(fieldId);
	if (stripSpace(field.value).length == 0){
		field.focus();
		field.value = "";
		return true;
	}else{
		return false;
	}
}

function isNumber(str){ 
	var digits = "0123456789";
	for(var i = 0; i < str.length; i++){
		if(digits.indexOf(str.charAt(i)) < 0){
			return false;
		}
	}
	return true;
}


function isValidEmail(str) {
	//var emailFilter=/^.+@.+\..{2,3,4}$/;
	var emailFilter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})$/;
	var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/;
	if (!(emailFilter.test(str)) || str.match(illegalChars)) { 
		   return false;
	}
	
	return true;
}