// form validation function //
function validateform(theform) {
if(theform.tagName != "FORM")
return;
	for(i=0;i<theform.elements.length;i++)
	{
	var currEl=theform.elements[i];
		if(currEl.value==""&&currEl.title=="Required")
		{
			currEl.style.borderColor="#ff0000";
			inlineMsg(currEl.name,'This field is required, please complete.',5);
			return false;
		}
		else if(currEl.alt=="numeric"&!IsNumeric(currEl.value))
		{
			currEl.style.borderColor="#ff0000";
			inlineMsg(currEl.name,'Please enter a valid number.',2);
			return false;
		}
		else if(currEl.alt=="date"&!IsDate(currEl.value))
		{
			currEl.style.borderColor="#ff0000";
			inlineMsg(currEl.name,'Please enter a valid date.',2);
			return false;
		}
		else
		{
			currEl.style.borderColor="";
		}
	}
  return true;
}

function removeLeadingZeros(str)
{
  while (str.charAt(0) == '0')
    str = str.substr(1);
  return str;
}


function IsDate(sDate) {
    var scratch = new Date(sDate);
    if (scratch.toString() == "NaN" || scratch.toString() == "Invalid Date") {
        return false;
    } else {
        return true;
    }
}


function IsNumeric(inputVal) {
     if (isNaN(parseFloat(inputVal))) {
          return false;
     }
     return true
}


// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
var MSGHIDE = 10;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide) {
  var msg;
  var msgcontent;
  if(!document.getElementById('msg')) {
    msg = document.createElement('div');
    msg.id = 'msg';
    msgcontent = document.createElement('div');
    msgcontent.id = 'msgcontent';
    document.body.appendChild(msg);
    msg.appendChild(msgcontent);
    msg.style.filter = 'alpha(opacity=0)';
    msg.style.opacity = 0;
    msg.alpha = 0;
  } else {
    msg = document.getElementById('msg');
    msgcontent = document.getElementById('msgcontent');
  }
  msgcontent.innerHTML = string;
  msg.style.display = 'block';
  var msgheight = msg.offsetHeight;
  var targetdiv = document.getElementById(target);
  targetdiv.focus();
  var targetheight = targetdiv.offsetHeight;
  var targetwidth = targetdiv.offsetWidth;
  var topposition = topPosition(targetdiv) - ((msgheight - targetheight) / 2);
  var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
  msg.style.top = topposition + 'px';
  msg.style.left = leftposition + 'px';
  clearInterval(msg.timer);
  msg.timer = setInterval("fadeMsg(1)", MSGTIMER);
  if(!autohide) {
    autohide = MSGHIDE;  
  }
  window.setTimeout("hideMsg()", (autohide * 1000));
}

// hide the form alert //
function hideMsg(msg) {
  var msg = document.getElementById('msg');
  if(!msg.timer) {
    msg.timer = setInterval("fadeMsg(0)", MSGTIMER);
  }
}

// face the message box //
function fadeMsg(flag) {
  if(flag == null) {
    flag = 1;
  }
  var msg = document.getElementById('msg');
  var value;
  if(flag == 1) {
    value = msg.alpha + MSGSPEED;
  } else {
    value = msg.alpha - MSGSPEED;
  }
  msg.alpha = value;
  msg.style.opacity = (value / 100);
  msg.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(msg.timer);
    msg.timer = null;
  } else if(value <= 1) {
    msg.style.display = "none";
    clearInterval(msg.timer);
  }
}

// calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
  var left = 0;
  if(target.offsetParent) {
    while(1) {
      left += target.offsetLeft;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.x) {
    left += target.x;
  }
  return left;
}

// calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
  var top = 0;
  if(target.offsetParent) {
    while(1) {
      top += target.offsetTop;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.y) {
    top += target.y;
  }
  return top;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(7,80); 
  arrow.src = "ajaxtabs/images/msg_arrow.gif"; 
}