function validate() {
	if(document.getElementById('txtname').value == "") {
		alert("Please enter your full name");
		document.getElementById('txtname').focus();
		return false;
	} else if(document.getElementById('txtcontact-number').value == "") {
		alert("Please enter your contact number");
		document.getElementById('txtcontact-number').focus();
		return false;
	} else if(echeck(document.getElementById('txtemail').value) == false) {
		document.getElementById('txtemail').value = "";
		document.getElementById('txtemail').focus();
		return false;
	} else if(document.getElementById('txtpost-code').value == "") {
		alert("Please enter postal code");
		document.getElementById('txtpost-code').focus();
		return false;
	} else if(document.getElementById('comments').value == "") {
		alert("Please enter your comments");
		document.getElementById('comments').focus();
		return false;
	} else if(document.getElementById('security-code').value == "") {
		alert("Please enter security code");
		document.getElementById('security-code').focus();
		return false;
	} else {
	return true;
	}
}
function IsNumeric(sText)

{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
	  { 
	  Char = sText.charAt(i); 
	  if (ValidChars.indexOf(Char) == -1) 
		 {
		 IsNumber = false;
		 }
	  }
   return IsNumber;
   
   }
   function echeck(str) {

	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		alert("Invalid E-mail ID")
		return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
		alert("Invalid E-mail ID")
		return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		alert("Invalid E-mail ID")
		return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
		alert("Invalid E-mail ID")
		return false
	 }
	
	 if (str.indexOf(" ")!=-1){
		alert("Invalid E-mail ID")
		return false
	 }

	 return true					
}