function filterTable(phrase, _id)
{
	var words = phrase.toLowerCase().split(" ");
	var table = document.getElementById(_id);
	var ele;
	for (var r = 1; r < table.rows.length; r++){
		ele = table.rows[r].innerHTML.replace(/<[^>]+>/g,"");
	        var displayStyle = 'none';
	        for (var i = 0; i < words.length; i++) {
		    if (ele.toLowerCase().indexOf(words[i])>=0)
			displayStyle = '';
		    else {
			displayStyle = 'none';
			break;
		    }
	        }
		table.rows[r].style.display = displayStyle;
	}
}

function filterCategories(_id) {

boxes = document.f1.chkCategory.length
txt = ""
for (i = 0; i < boxes; i++) {
if (document.f1.chkCategory[i].checked) {
txt = txt + document.f1.chkCategory[i].value + " "
}
}
filterTable(txt, _id);
}