// PRE-LOAD IMAGES AND SET UP SWAPPING //

if (document.images)  {

// ON IMAGES //
homeON = new Image(31,73);
homeON.src = "img/nav_home_on.gif";
catalogON = new Image(31,80);
catalogON.src = "img/nav_catalog_on.gif";
whatsnewON = new Image(31,106);
whatsnewON.src = "img/nav_whatsnew_on.gif";
ourcompanyON = new Image(31,118);
ourcompanyON.src = "img/nav_ourcompany_on.gif";
faqON = new Image(31,61);
faqON.src = "img/nav_faq_on.gif";
contactusON = new Image(31,104);
contactusON.src = "img/nav_contactus_on.gif";

// OFF IMAGES //
homeOFF = new Image(31,73);
homeOFF.src = "img/nav_home_off.gif";
catalogOFF = new Image(31,80);
catalogOFF.src = "img/nav_catalog_off.gif";
whatsnewOFF = new Image(31,106);
whatsnewOFF.src = "img/nav_whatsnew_off.gif";
ourcompanyOFF = new Image(31,118);
ourcompanyOFF.src = "img/nav_ourcompany_off.gif";
faqOFF = new Image(31,61);
faqOFF.src = "img/nav_faq_off.gif";
contactusOFF = new Image(31,104);
contactusOFF.src = "img/nav_contactus_off.gif";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}

function fnValidEmail(email) {
	    //Check to see if the email addresses are of the correct form
	    var x = email;
	    var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	    if (filter.test(x)) {
		    return true ;
	    } else {
		    //alert("Invalid email address");
		    return false;
	    }
    }