// JavaScript1.2 Document

//	form validation using regular expression available for JavaScript 1.2
function isEmail(string) {
   if (!string) return false;
   if ((string.indexOf(".") < 1) && (string.indexOf("@") < 1)) return false;
   var iChars = "*|,\":<>[]{}`\';()&$#%";

   for (var i = 0; i < string.length; i++) {
      if (iChars.indexOf(string.charAt(i)) != -1)
         return false;
   }
   return true;
}

function isAlphaNumeric(string) {
   if (!string) return false;
   if (string == " ") return false;
   
   var iChars = "*|,\":<>[]{}`\';()@&$#%";

   for (var i = 0; i < string.length; i++) {
      if (iChars.indexOf(string.charAt(i)) != -1)
         return false;
   }
   return true;
}

// change button style
function selOn(ctrl) {
	ctrl.style.cursor = 'pointer';
	ctrl.style.backgroundColor = 'ButtonFace';
	ctrl.style.borderColor = 'ButtonHighlight ButtonShadow ButtonShadow ButtonHighlight';
}

function selOff(ctrl) {
	ctrl.style.cursor = 'pointer';
	ctrl.style.borderColor = 'ButtonFace';  
	ctrl.style.backgroundColor = 'transparent';
}

function selDown(ctrl) {
	ctrl.style.cursor = 'pointer';
	ctrl.style.borderColor = 'ButtonShadow ButtonHighlight ButtonHighlight ButtonShadow';
	ctrl.style.backgroundColor = 'ButtonFace';
}

//	layout functions
function displayCurrentDate() {
	var day = Array('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
	var month = Array('Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
	
	var now = new Date();
	var dw = now.getDay();
	var dn = now.getDate();
	var mn = now.getMonth();
	var yn = now.getFullYear();
	
	display = day[dw] + ', ' + month[mn] + ' ' + dn + ', ' + yn;
	document.writeln(display);
}

function LoadImage() {
	document.getElementById('header').src = tmp.src;
	document.getElementById('header').style.visibility = "visible";
}