function Validate()
{
	var fname=document.getElementById("first_name");
	var position=document.getElementById("position");
	var email=document.getElementById("emailaddress");
	var phone=document.getElementById("telephone_number");
	var postal=document.getElementById("postcode");
	var comments=document.getElementById("comments");
	
	if(fname.value=="")
	{
		alert("Please enter your name");
		fname.focus();
		return false;
	}
	else if(email.value=="")
	{
		alert("Please enter the email address");
		email.focus();
		return false;
	}
	else if (echeck(email.value)==false){
		//email.value=""
		email.focus()
		return false
	}
	else if(phone.value=="")
	{
		alert("Please enter the telephone number");
		phone.focus();
		return false;
	}
	else if(postal.value=="")
	{
		alert("Please enter the postcode");
		postal.focus();
		return false;
	}
	else if(comments.value=="")
	{
		alert("Please enter what would you like to know");
		comments.focus();
		return false;
	}
	
}


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					
	}