function emailOk(emailAddr) {

        var i;

        i = emailAddr.indexOf("@");

        if (i == -1) {

                return false;

        }

        var username = emailAddr.substring(0, i);

        var domain = emailAddr.substring(i + 1, emailAddr.length)

        i = 0;

        while ((username.substring(i, i + 1) == " ") && (i < username.length)) {

                i++;

        }

        if (i > 0) {

                username = username.substring(i, username.length);

        }

        i = domain.length - 1;

        while ((domain.substring(i, i + 1) == " ") && (i >= 0)) {

                i--;

        }

        if (i < (domain.length - 1)) {

                domain = domain.substring(0, i + 1);

        }

        if ((username == "") || (domain == "")) {

                return false;

        }

        var ch;

        for (i = 0; i < username.length; i++) {

                ch = (username.substring(i, i + 1)).toLowerCase();

                if (!(((ch >= "a") && (ch <= "z")) ||

                        ((ch >= "0") && (ch <= "9")) ||

                        (ch == "_") || (ch == "-") || (ch == "."))) {

                                return false;

                }

        }



        for (i = 0; i < domain.length; i++) {

                ch = (domain.substring(i, i + 1)).toLowerCase();

                if (!(((ch >= "a") && (ch <= "z")) ||

                        ((ch >= "0") && (ch <= "9")) ||

                        (ch == "_") || (ch == "-") || (ch == "."))) {

                                return false;

                }

        }

        i = domain.indexOf(".");

        if (i == -1) {

                return false;

        }

        return true;

};



function validate(form){

    good = true;

    err = "Error :\n";

    

	if (document.getElementsByName("fname").length){

		if (form.fname.value==''){

			good=false;

			err+="First name,\n";

		};

	}



	if (document.getElementsByName("lname").length){

		if (form.lname.value==''){

			good=false;

			err+="Name,\n";

		};

	}

	

	if (document.getElementsByName("city").length){

		if (form.city.value==''){

			good=false;

			err+="City,\n";

		};

	}

	

	if (document.getElementsByName("zip").length){

		if (form.zip.value==''){

			good=false;

			err+="Zip COde,\n";

		};

	}

	

	if (document.getElementsByName("email").length){

		if (!emailOk(form.email.value)){

			good=false;

			err+="E-mail,\n";

		};

	}

	

	if (document.getElementsByName("username").length){

		if (form.username.value.length<6){

			good=false;

			err+="Pseudo (at least 6 characters),\n";

		};

		

		if (form.username.value.length>12){

			good=false;

			err+="Pseudo no more 12 characters,\n";

		};

		

		us_pass = true;

	

		for (i = 0; i < form.username.value.length; i++) {

			ch = (form.username.value.substring(i, i + 1)).toLowerCase();

			if (!(((ch >= "a") && (ch <= "z")) || ((ch >= "0") && (ch <= "9")) || (ch == "_") || (ch == "-") || (ch == "."))) {

				us_pass = false;

				good = false;

			}

		}

		if (! us_pass) err+="Pseudo only this characters a-z, A-Z, 0-9,\n";

	}

	

	if (document.getElementsByName("password").length && document.getElementsByName("username").length){

		if (form.password.value == form.username.value){

			good=false;

			err+="Password and Pseudo too similar,\n";

		};

	}

	

	if (document.getElementsByName("password").length){

		if (form.password.value==''){

			good=false;

			err+="Password,\n";

		};

		if (form.password.value.length < 6){

			good=false;

			err+="Password (At least 6 characters),\n";

		};

		if (form.password.value.length > 12){

			good=false;

			err+="Password (12 characters max),\n";

	

		};

		

		us_pass = true;

		for (i = 0; i < form.password.value.length; i++) {

			ch = (form.password.value.substring(i, i + 1)).toLowerCase();

			if (!(((ch >= "a") && (ch <= "z")) || ((ch >= "0") && (ch <= "9")) || (ch == "_") || (ch == "-") || (ch == "."))) {

				us_pass = false;

				good = false;

			}

		}

		if (! us_pass) err+="Password only this characters a-z, A-Z, 0-9,\n";

			err+="Please verify it and ENTER.";

	}



    if (!good) {



        alert(err);



    };



    return good;

	

	



}