<INPUT TYPE="text" id="k"><INPUT TYPE="button" VALUE="ok" ONCLICK="xx()">
<SCRIPT LANGUAGE="JavaScript">
<!--
function xx(){
var k=document.getElementById("k").value;var tab=document.getElementById("tab");var td=tab.getElementsByTagName(‘td‘)var tdl=td.length;for (i=0;i<tdl ;i++ ){td[i].style.backgroundColor="#fff";//if (td[i].innerHTML.indexOf(k)>-1 ){td[i].style.backgroundColor="#ddd";//}}} //-->
</SCRIPT>