function isValidEmail (email,strict){
   if ( !strict ) email = email.replace(/^\s+|\s+$/g, '');
   return (/^([a-z0-9_\-]+\.)*[a-z0-9_\-]+@([a-z0-9][a-z0-9\-]*[a-z0-9]\.)+[a-z]{2,4}$/i).test(email);
}
$(document).ready(function(){
	$("#btnsend").click(function(){	   
	    var countErr = 0;
		$("input.requered:text").each(function(){
	       if (!$(this).val()){
		      $(this).addClass("alert"); countErr++;
			  if (countErr==1) $(this).focus();
		   }
        }); 
		if ( $("#email").val() && !isValidEmail($("#email").val()) ){
		    $("#email").addClass("alert");
			countErr++;
			if (countErr==1) $("#email").focus();
        }	
        $("textarea").each(function(){
	       if (!$(this).val()){
		      $(this).addClass("alert"); countErr++;
			  if (countErr==1) $(this).focus();
		   }
        });		
        if (countErr) return false;
    });
	$("input:text").focus(function(){if ($(this).hasClass("alert")) $(this).removeClass("alert");});
	$("textarea").focus(function(){if ($(this).hasClass("alert")) $(this).removeClass("alert");});
});