function clearfield()
	{
	document.forms.search.pc.value='';
	}
	
	/*
Validate the search form entries for postal code and subject
*/

function validate()
	{
	var zip = document.forms.search.pc.value;  
	var subject = document.forms.search.sub.value;
	var flag_zip = false;
	var flag_sub = false;
	document.getElementById('error1').innerHTML = '';
	document.getElementById('error2').innerHTML = '';

	if (zip != null && (zip.length) == 5 && ((zip.indexOf(0) == 0) || (parseInt(zip) == zip)))
	{
		flag_zip = true;
	}	  
		if (subject != 'none' ) 
	{ 
		flag_sub = true;
	}
		   
	if (!(flag_zip))
		document.getElementById('error1').innerHTML = 'Valid Zip Required';
		
	if (!(flag_sub))	
		document.getElementById('error2').innerHTML = 'Subject Required';
		
	if (!(flag_zip && flag_sub))
		{return (false)}
	
	else 
		return(true);	
	}