<!-- Used with main.jsp and searchResults.jsp for checking search options -->
//coordinate "check all" and individual choice checkboxes
function checkBoxes(){
	if (document.searchForm.byAll.checked) {
 		document.searchForm.name.checked=true; 
 		document.searchForm.title.checked=true; 
 		document.searchForm.area.checked=true;
	}
	if (!document.searchForm.byAll.checked){
 		document.searchForm.name.checked=false; 
 		document.searchForm.title.checked=false; 
 		document.searchForm.area.checked=false;		
	}
}

//check "check all" box if all others are checked
function checkAll(){
	if(document.searchForm.name.checked && document.searchForm.title.checked && document.searchForm.area.checked)
		document.searchForm.byAll.checked=true;
}

//alert the user when no search options are selected
function checkOptions(){
	if(!document.searchForm.name.checked && !document.searchForm.title.checked && !document.searchForm.area.checked){
	  alert("Please enter at least one search option.");
	  return false;
	}
	return true;
}