String.prototype.Trim = function()
{
	return this.replace(/(^\s*)|(\s*$)/g, "");
}

function isEmail(mail)
{
	var reg = /^[a-zA-Z0-9_\.]+@[a-zA-Z0-9-]+[\.a-zA-Z]+$/;
	if(reg.test(mail))
	{
		return true;
	}
	else
	{
		return false;
	}
}
function checkTextarea(obj,l)
{
	obj.value = obj.value.replace(/\r\n/,"");
	if(obj.value.length > l)
	obj.value = obj.value.substring(0,l);
}