// form validation function //
function textCounter(field,cntfield,maxlimit) {
	if (field.value.length > maxlimit) // if too long...trim it!
	field.value = field.value.substring(0, maxlimit);
	// otherwise, update 'characters left' counter
	else
	cntfield.value = maxlimit - field.value.length;
}

// form validation function //
function validate() {
	var txtName=document.getElementById('txtName').value ;
	var txtCompanyName=document.getElementById('txtCompanyName').value ;
	var txtEmail=document.getElementById('txtEmail').value ;
	var txtPhone=document.getElementById('txtPhone').value ;
	var taComment=document.getElementById('taComment').value ;
	var nameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
	var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
	var phoneRegex = /^[\(]?(\d{0,3})[\)]?[\s]?[\-]?(\d{3})[\s]?[\-]?(\d{4})[\s]?[x]?(\d*)$/;
	  if(txtName == "") {
		inlineMsg('txtName','You must enter Your name.');
		return false;
	  }
	  if(txtCompanyName == "") {
		inlineMsg('txtCompanyName','You must enter Your company name.');
		return false;
	  }
	  if(txtEmail == "") {
		inlineMsg('txtEmail','You must enter your e-mail address.',2);
		return false;
	  }
	  if(!txtEmail.match(emailRegex)) {
		inlineMsg('txtEmail','You have entered an invalid e-mail address.',2);
		return false;
	  }
	  if(txtPhone == "") {
		inlineMsg('txtPhone','You must enter your telephone.',2);
		return false;
	  }
	  /*if(!txtPhone.match(phoneRegex)) {
		inlineMsg('txtPhone','You have entered an invalid telephone.',2);
		return false;
	  }*/
	  if(taComment == "") {
		inlineMsg('taComment','You must enter your comment.',2);
		return false;
	  }
	  frmContact.mode.value='sendContact';
	  frmContact.submit();
	  return true;
}
// START OF MESSAGE SCRIPT //

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

// 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;
}