function rmspaces(x) {
	var leftx = 0;
	var rightx = x.length -1;

	while ( x.charAt(leftx) == ' ') {
		leftx++;
	}
	while ( x.charAt(rightx) == ' ') {
		--rightx;
	}

	var q = x.substr(leftx,rightx-leftx + 1);

	if ( (leftx == x.length) && (rightx == -1) ) {
		q = '';
	}

	return(q);
}

function checkfield(data) {
	if (rmspaces(data) == "") {
		return false;
	} else {
		return true;
	}
}

function isemail(data) {
	var flag = false;
	if ( data.indexOf("@",0)  == -1 || data.indexOf("\\",0)  != -1 || data.indexOf("/",0)  != -1 || !checkfield(data) || data.indexOf(".",0)  == -1 || data.indexOf("@")  == 0 || data.lastIndexOf(".") < data.lastIndexOf("@") || data.lastIndexOf(".") == (data.length - 1) || data.lastIndexOf("@") !=   data.indexOf("@") || data.indexOf(",",0)  != -1 || data.indexOf(":",0)  != -1 || data.indexOf(";",0)  != -1  ) {
		return flag;
	} else {
		var temp = rmspaces(data);

		if (temp.indexOf(' ',0) != -1) {
			flag = true;
		}

		var d3 = temp.lastIndexOf('.') + 4;
		var d4 = temp.substring(0,d3);
		var e2 = temp.length  -  temp.lastIndexOf('.')  - 1;
		var i1 = temp.indexOf('@');

		if ( (temp.charAt(i1+1) == '.') || ( e2 > 4 )  ||  ( e2 < 2 ) ) {
			flag = true;
		}

		return !flag;
	}
}

$(document).ready(function(){
	$('input#btnSubmit').click(function(){
		if ( !isemail($('#nemail').val()) ) {
			alert("Please enter your E-mail");
			return false;
		} else {
			return true;
		}
	});
});