var emailtest;

function checkemail(str) {
	 var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	
	if (reg.test(str))
		emailtest=true
	else {
		emailtest=false
	}
	return (emailtest)
}

function formCheck(formobj){
	var fieldRequired = Array("name", "number", "email", "message");
	var fieldDescription = Array("Your name", "Your contact number", "Your email address", "Your message");
	var alertMsg = "Please provide the following:\n\n";
	
	var l_Msg = alertMsg.length;
	
	for (var i = 0; i < fieldRequired.length; i++){
		var obj = formobj.elements[fieldRequired[i]];
		if (obj){
			switch(obj.type){
			case "select-one":
				if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == ""){
					alertMsg += " - " + fieldDescription[i] + "\n\n";
				}
				break;
			case "select-multiple":
				if (obj.selectedIndex == -1){
					alertMsg += " - " + fieldDescription[i] + "\n\n";
				}
				break;
			case "text":
			case "textarea":
				if (fieldRequired[i] == "email") {
					if (obj.value == "" || obj.value == null){
						alertMsg += " - " + fieldDescription[i] + "\n\n";
					} else if (checkemail(obj.value) == false) {
						alertMsg += " - A VALID email address" + "\n\n";
					}
				} else {
					if (obj.value == "" || obj.value == null){
						alertMsg += " - " + fieldDescription[i] + "\n\n";
					}
				}
				break;
			default:
			}
			if (obj.type == undefined){
				var blnchecked = false;
				for (var j = 0; j < obj.length; j++){
					if (obj[j].checked){
						blnchecked = true;
					}
				}
				if (!blnchecked){
					alertMsg += " - " + fieldDescription[i] + "\n\n";
				}
			}
		}
	}

	if (alertMsg.length == l_Msg){
		return true;
	}else{
		alert(alertMsg);
		return false;
	}
}