function checkform(form) {
var message = '';
        if(form.txtName.value == "") {
                message += "*** Please input your name.\n";
        }
        if(form.txtEmail.value == "") {
                message += "*** Please input your email address.\n";
        }
	if(form.txtEmail.value != "" && !echeck(form.txtEmail.value)) {
		message += "*** Email format invalid.\n";
	}
        //if(form.logolookandfeel.type == "checkbox" && form.logolookandfeel.value == "") {
/*  
	if(form.logolookandfeel0.checked == false) {
                        count++;
        }
*/
	if(form.txtComments.value == "") {
		message += "*** Please input your comment.\n";
	}
/*
        if(count == 9) {
                message += "*** Please tick any one box you desire.\n";
        }
*/
        if(message != "") {
                alert(message);
                return false;
        }
        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){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    return false
		 }

 		 return true					
}