String.prototype.trim = function()
{
    return this.replace(/(^\s*)|(\s*$)/g,"");
	
}
function isEmail(str)
{
	var reg1 = new RegExp('^[a-zA-Z0-9][a-zA-Z0-9@._-]{3,}[a-zA-Z]$');
	var reg2 = new RegExp('[@.]{2}');
	
	if (str.search(reg1) == -1
			|| str.indexOf('@') == -1
			|| str.lastIndexOf('.') < str.lastIndexOf('@')
			|| str.lastIndexOf('@') != str.indexOf('@')
			|| str.search(reg2) != -1)
		return false;
	
	return true;
}

function chk_fill()
{
	if(form1.txtname.value.trim()=="")
	{
    	alert("Please fill  name");
		form1.txtname.focus();
		return false;
	}
	
	if(form1.txtemail.value.trim()=="")
	{
		alert("Please fill email");
		form1.txtemail.focus();
		return false;
	}
	
	if (!isEmail(form1.txtemail.value.trim()))
	{
		alert("Please check Email address");
		form1.txtemail.focus();
		return false;
	}
	
	return true;
}