// common javascript 

function MM_swapImgRestore() { 
  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_preloadimage() { 
  var d=document; if(d.image){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadimage.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_findObj(n, d) { 
  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 && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() {
  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];}
}


var numb = '0123456789';
var lwr = 'abcdefghijklmnopqrstuvwxyz';
var upr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var str = '-_. ';


function isValid(parm,val) 
{
	if (parm == "") return false;

	for (i = 0; i < parm.length; i++) 
	{
		if (val.indexOf(parm.charAt(i),0) == -1) return false;
	}

	return true;
}

function isValid2(email) {
	var invalidChars = "\"|&;<>!*\'\\"   ;
	  for (var i = 0; i < invalidChars.length; i++) {
		if (email.indexOf(invalidChars.charAt ) != -1) {
		alert("Wrong E-mail address.");
		  return false;
		}
	  }
	  if (email.indexOf("@")==-1){
		alert("Wrong E-mail address.");
		return false;
	  }
	  if (email.indexOf(" ") != -1){
		alert("Wrong E-mail address.");
		return false;
	  }
	  if (window.RegExp) {
		var reg1str = "(@.*@)|(\\.\\.)|(@\\.)|(\\.@)|(^\\.)";
		var reg2str = "^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$";
		var reg1 = new RegExp (reg1str);
		var reg2 = new RegExp (reg2str);
	 
		if (reg1.test(email) || !reg2.test(email)) {
		alert("Wrong E-mail address.");
		 return false;
		}
	  }
	  return true;
	} 

function isNum(parm) {return isValid(parm,numb);}

function isLower(parm) {return isValid(parm,lwr);}

function isUpper(parm) {return isValid(parm,upr);}

function isAlpha(parm) {return isValid(parm,lwr+upr);}

function isString(parm) {return isValid(parm,lwr+upr+numb+str);}

function isEmail(parm) {return isValid2(parm);}

function isZipCode(parm)
{
	if (!isNum(parm) || parm.length != 5)
	{
		return false;
	}

	return true;
}

function isPhone(parm) 
{
	if (!isValid(parm,numb+"-") || parm.length < 12 || parm.length > 13)
	{
		if (!isValid(parm,numb) || parm.length != 10)
		{
			return false;
		}
	}

	return true;
}

function isAreaCode(parm)
{
	if (!isNum(parm) || parm.length != 3)
		return false;

	return true;
}

function isAlphanum(parm) 
{
	return isValid(parm,lwr+upr+numb);
}


//
function radio_button_checker(radioBtnObj)
{
	// set var radio_choice to false
	var radio_choice = false;

	// Loop from zero to the one minus the number of radio button selections
	for (counter = 0; counter < radioBtnObj.length; counter++)
	{
		// If a radio button has been selected it will return true
		// (If not it will return false)
		if (radioBtnObj[counter].checked)
			radio_choice = true; 
	}

	return radio_choice;
}