// Utility functions for working with Objects cross browser platform.

var ns4 = (document.layers) ? true : false;
var ie4 = (document.all && !document.getElementById) ? true : false;
var ie5 = (document.all && document.getElementById) ? true : false;
var ns6 = (!document.all && document.getElementById) ? true : false;

function getObj(oname)
{	           	
     if ((ie4 || ie5)) return document.all[oname];	
     if (ns4) return document.layers[oname];
     if (ns6) return document.getElementById(oname);     
     return null; // Unsupported browser.
}

var pCnt=0;

function uc(cb)
{
	if(cb.checked) pCnt++;
	else pCnt--;
	if(pCnt<0)pCnt=0;
}

function trim(s)
{
	if(typeof(s)!='string') return s;
	while (s.substring(0,1) == ' ') 
	{
		s = s.substring(1,s.length);
	}
	while (s.substring(s.length-1,s.length) == ' ')
	{
		s = s.substring(0,s.length-1);
	}
	return s;
}

function isEmailAddr(Email)
{
	var result = false;
	var theStr = new String(Email);
	var index = theStr.indexOf("@");

	if (index > 0)
	{
		var pindex = theStr.indexOf(".",index);
		if ((pindex > index+1) && (theStr.length > pindex+1))
			result = true;
	}
  	return result;
}

function sbIsValid()
{
	var r='';

	if(trim(document.form1.contactname.value)=='') r+='\n - your name';
	if(!isEmailAddr(document.form1.email.value)) r+='\n - your email address';
	if(trim(document.form1.message.value)=='') r+='\n - your message';
				 
	if(r!='')
	{
		alert('Please enter the following:' +r);
		return false;
	}
	return true;
}

function sbSubmit()
{
	if(sbIsValid()) document.form1.submit();	
}