chk1=document.getElementById('byProductNumberId');
chk2=document.getElementById('byProductNameId');
chk3=document.getElementById('byProductDescriptionId');
kw=document.getElementById('keyword');
inp1=document.getElementById('priceFromInput');
inp2=document.getElementById('priceToInput');

	
function frmSubmit()
{
	var ok=false;
	if(inp1.value!='' || inp2.value!='') ok=true;
	if((chk1.checked || chk2.checked || chk3.checked) && kw.value=='') 
	{
		alert('Please enter keyword(s) to search for.');
		return false;
	}
	if(chk1.checked || chk2.checked || chk3.checked) ok=true;
	if(ok==false)
	{
		alert('Please enter search criteria.');
		return false;
	}
	if(inp1.value=='') inp1.disabled=true;
	if(inp2.value=='') inp2.disabled=true;
	return true;
}