function ValidateForm(){
	var emailID2=document.frmTurn.txtTrainer;
	var emailID=document.frmTurn.txtEmail;

	if ((emailID2.value==null)||(emailID2.value=="")){
		alert("Please enter your name.");
		emailID2.focus();
		return false;
	}
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please enter your email address.");
		emailID.focus();
		return false;
	}

	if (echeck(emailID.value)==false){
		emailID.focus()
		return false
		}

	document.frmTurn.submit();
	return true;
 }

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("The email address you have entered is in an invalid format.")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("The email address you have entered is in an invalid format.")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		   alert("The email address you have entered is in an invalid format.")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		   alert("The email address you have entered is in an invalid format.")
		    return false
		 }


		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		   alert("The email address you have entered is in an invalid format.")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		   alert("The email address you have entered is in an invalid format.")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		   alert("The email address you have entered is in an invalid format.")
		    return false
		 }

 		 return true					
	}

 function checkCR(evt)
 {

    var evt  = (evt) ? evt : ((event) ? event : null);

    var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);

    if ((evt.keyCode == 13) && (node.type=="text")) {return false;}

  }

  document.onkeypress = checkCR;