function isblank(s)
{
    for(var i = 0; i < s.length; i++) {
        var c = s.charAt(i);
        if ((c != ' ') && (c != '\n') && (c != '\t')) return false;
    }
    return true;
}
/*
function isValidEmail(e)
{
	exp="^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z]{2,4}(\.[a-zA-Z]{2,3})?(\.[a-zA-Z]{2,3})?$";
	emailregexp = new RegExp(exp);
	result = e.match(emailregexp);
	if (result != null)
	{
		return true;
	}
	else
	{
		return false;
	}
}
*/

function isValidEmail(e)
{
	//exp="^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z]{2,4}(\.[a-zA-Z]{2,3})?(\.[a-zA-Z]{2,3})?$";
exp="^[a-z0-9][a-z0-9_\.-]{0,}[a-z0-9]@[a-z0-9][a-z0-9_\.-]{0,}[a-z0-9][\.][a-z0-9]{2,4}$";
	
	emailregexp = new RegExp(exp);

	result = e.match(emailregexp);
	if (result != null)
	{
		return true;
	}
	else
	{
		return false;
	}
}

function isValidNumber(numval)
{
	if (numval==""){return false;}
	var myRegExp = new RegExp("^[+()/#*-_]?[0-9]?[+()/#*-_]*[/.]?[0-9]*$");
	return myRegExp.test(numval);
}

function CheckExtension(fld)
{
    if (valid_extensions.test(fld.value)) return true;
    alert('The selected file is of the wrong type.');
    fld.select();
    fld.focus();
    return false;
}
function selectli(url)
{
	if(url == "fd")
	{
	document.getElementById('li1').addClass = "selectli";
	}
	else if(url == "about")
	{
		document.getElementById('li2').addClass = "selectli";
	}else if(url == "home")
	{
		document.getElementById('li3').addClass = "selectli";
	}else if(url == "about")
	{
		document.getElementById('li4').addClass = "selectli";
	}else if(url == "about")
	{
		document.getElementById('li5').addClass = "selectli";
	}
}

function list()
	{
	
		if(document.getElementById('about').value == "Products")
		{
		document.getElementById('id1').style.display = '';
		}
		else
		{
		document.getElementById('id1').style.display = 'none';
		}
	}
	function valid1(f) {
!(/^[ñ0-9()+-]* $/i).test(f.value)?f.value = f.value.replace(/[^ñ0-9 ()+-]/ig,''):null;
} 
function checkCheckbox (f, require) {
var checked = 0, e, i = 0
while (e = f.elements[i++]) {if (e.type == 'checkbox' && e.checked) checked++}
return require <= checked
}