var qstring = document.referrer;
if(qstring.indexOf('google.com') > -1 && qstring.indexOf('q=') > -1) {
 start = qstring.indexOf('q=') + 2;
 if(qstring.indexOf('&',start) > -1) {
  end = qstring.indexOf('&',start);
 } else {
  end = qstring.length;
 }
 qstr = qstring.substring(start,end)
 re = /\+/gi;
 newstr=qstr.replace(re, ' ');
 document.PartNo.txtpartno.value = unescape(newstr);
 //document.PartNo.txtpartno.value = unescape(qstring.substring(start,end));
}

if(qstring.indexOf('msn.com') > -1 && qstring.indexOf('q=') > -1) {
 start = qstring.indexOf('q=') + 2;
 if(qstring.indexOf('&',start) > -1) {
  end = qstring.indexOf('&',start);
 } else {
  end = qstring.length;
 }
 qstr = qstring.substring(start,end)
 re = /\+/gi;
 newstr=qstr.replace(re, ' ');
 document.PartNo.txtpartno.value = unescape(newstr);
 //document.PartNo.txtpartno.value = unescape(qstring.substring(start,end));
}

if(qstring.indexOf('yahoo.com') > -1 && qstring.indexOf('p=') > -1) {
 start = qstring.indexOf('p=') + 2;
 if(qstring.indexOf('&',start) > -1) {
  end = qstring.indexOf('&',start);
 } else {
  end = qstring.length;
 }
 qstr = qstring.substring(start,end)
 re = /\+/gi;
 newstr=qstr.replace(re, ' ');
 document.PartNo.txtpartno.value = unescape(newstr);
 //document.PartNo.txtpartno.value = unescape(qstring.substring(start,end));
}