function CheckNavigatorVersion()
{
	if (parseInt(navigator.appVersion) >= 4)
		{
			return true;
		}
    	return false;

}

function MustEnter(obj, field)
{

	if (obj.value == "") 
	{
		alert("Please enter " + field);
		obj.focus();
		obj.select();
		
		return false;
	}
	return true;
}

function MustEnterInt(obj, field)
{
	if ( MustEnter(obj, field) )
	{
		if (isNaN(obj.value) ){
			alert("Please enter a valid integer for " + field);
			obj.focus();
			obj.select();
			return false;
		}
		
		return true;
	}
	return false;
}

function validateEmail(field, fieldName){
	var str
	str = field.value;
		
	var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)|(^\s)/;
	var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; 
	  
	if (!reg1.test(str) && reg2.test(str)) { 
     return true;
	}

	return false;
}