function validate(appointment) 
{ 
	var patname = appointment.pname.value;
	var dob = appointment.txtdob.value;
	var age = appointment.txtage.value;	
	var gender = appointment.selgender.value;
	var address = appointment.txtaddress.value;
	var phone = appointment.cellno.value;
	var mail = appointment.email.value;
	var doapp = appointment.txtappdat.value;
    var dise = appointment.disease.value;
	var patnameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
	var emailRegex = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/;
	var phonenum = /^[0-9]{2,3}-? ?[0-9]{6,7}$/;
	var agenum = /^\d{1,2}$/;
	
	
  if(patname == "") 
  {
  	inlineMsg('pname','Please enter the Patient name.');
    return false;
  }
  if(!patname.match(patnameRegex)) 
  {
    inlineMsg('pname','Please enter letters only.');
    return false;
  }

   if(dob == "")
   {
    inlineMsg('txtdob','Please select your date of birth.');
    return false;
  }
  
   if(age == "")
   {
    inlineMsg('txtage','Please fill your age.');
    return false;
  }
  
  if(!age.match(agenum)) 
  {
    inlineMsg('txtage','Please enter numbers only.');
    return false;
  }
  
   if(gender == "Select") 
  {
  	inlineMsg('selgender','Please select a Gender');
    return false;
  }
  
  if(address == "")
   {
    inlineMsg('txtaddress','Please fill your address.');
    return false;
  }
    
	 if(phone == "")
   {
    inlineMsg('cellno','Please enter your Phone number.');
    return false;
  }
  
   if(!phone.match(phonenum)) 
  {
    inlineMsg('cellno','Please enter numbers in 10 digits only.<br/>[9996568994]');
    return false;
  }
    
  if(mail == "")
   {
    inlineMsg('email','Please enter your email.');
    return false;
  }
  if(!mail.match(emailRegex)) 
  {
    inlineMsg('email','You have entered an invalid email.');
    return false;
  }
  
   if(doapp == "")
   {
    inlineMsg('txtappdat','Please select your preferred appointment date.');
    return false;
  }

  if(dise == "")
   {
    inlineMsg('disease','Please give a description about your illness. For eg: I am suffering from Knee Pain, shoulder pain, fracture, etc...');
    return false;
  }

    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;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(15,100); 
  arrow.src = "images/msg_arrow_red.gif"; 
}



function validateFileExtension(fld) {
	if(!/(doc)$/i.test(fld.value)) {
		alert("Please Upload .doc file format.");
		document.getElementById("resume").value='';
		fld.focus();
		return false;
	}
	return true;
}