function clearfield()
{document.forms.search.PC.value='';}
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))
clearfield();if(!(flag_sub))
document.getElementById('error2').innerHTML='Subject Required';if(!(flag_sub))
{return(false);}
else
document.forms.search.submit();}