web page locks up when selecting more criteria

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ASP

Javascript

i am calling this function when the user clicks on More/less criteria button in our webpage.that is if u click on MoreCriteria Button it gives more options to search in our web page.My question is when u minimize the website to about 1/4 of the screen width horizontally the website locksup nothing works and we have to purposely close the web page.so i need a solution for it that is it shouldnot lockup.

I have find the line where it gets lockup that is: script += " document.all('" + AdvCritTableIdOrReflowTagId + "').Show('"+ advCriteriaPropertyName + "', '" + advCriteriaPropertyValue + "');";

If could anyone tell me what could be replacement code for the above mention line.

Programing langauge used is ASP,Javascript
Browser:IE7,IE8,IE6

function AddMoreLessButton(strMoreLiteral, strLessLiteral, inpAdvActiveValue,
                            formName, hdnInpAdvActiveName, AdvCritTableIdOrReflowTagId, advCriteriaPropertyName,
                            advCriteriaPropertyValue, oStringBuilder)
{
    var val;
    if(inpAdvActiveValue == "1") val = strLessLiteral; else val = strMoreLiteral;
    var btn = "<input type='button' class='btn' name='btnMoreCriteria' id='btnMoreCriteria'";
    btn += " value='" + val + "'";
    btn += " onclick='MoreCriteriaClicked(); return false;'";
    btn += " morelit='" + strMoreLiteral + "' lesslit='" + strLessLiteral + "'/>";

    if(oStringBuilder){
        oStringBuilder.Append(btn);
    } else {
        Response.Write(btn);
    }

    var script = "<";
    script += "script language=javascript defer='defer'>";
    script += " function MoreCriteriaClicked(){ ";
    script += " var oBtn = document.all('btnMoreCriteria'); ";
    script += " if(oBtn.value == oBtn.morelit) DisplayMoreCriteria(oBtn);";
    script += " else DisplayLessCriteria(oBtn); } ";


    script += "function DisplayMoreCriteria(oBtn){";
    script += "try{";
    script += " try{";
    script += " oBtn.style.display = '';";
    script += "     document.all('" + AdvCritTableIdOrReflowTagId + "').Show('"+ advCriteriaPropertyName + "', '" + advCriteriaPropertyValue + "');";
    script += " }catch(e){ document.all." + AdvCritTableIdOrReflowTagId + ".style.display='inline';}";
    script += " document.forms." + formName + "." + hdnInpAdvActiveName + ".value = '1';";
    script += " oBtn.value = oBtn.lesslit;}catch(e){}}";

    script += "function DisplayLessCriteria(oBtn){";
    script += "try{";
    script += " try{";
    script += " oBtn.style.display = '';";
    script += "     document.all('" + AdvCritTableIdOrReflowTagId + "').Hide('"+ advCriteriaPropertyName + "', '" + advCriteriaPropertyValue + "');";
    script += " }catch(e){ document.all." + AdvCritTableIdOrReflowTagId + ".style.display='none';}";
    script += " document.forms." + formName + "." + hdnInpAdvActiveName + ".value = '0';";
    script += " oBtn.value = oBtn.morelit;}catch(e){}}";

    if(inpAdvActiveValue == "1"){
        //script += "objILConstructors.register(function(){var oBtn = document.all('btnMoreCriteria')});";
        script += "objILConstructors.register(function(){var oBtn = document.all('btnMoreCriteria'); DisplayMoreCriteria(oBtn);});";
        script += "var oBtn = document.all('btnMoreCriteria');";
        script += " DisplayMoreCriteria(oBtn);";
    }
    else
      {
         script += "objILConstructors.register(function(){var oBtn = document.all('btnMoreCriteria');DisplayLessCriteria(oBtn);});";
      }


    script += " AdvActiveNodeName='" + hdnInpAdvActiveName + "';";
    script += " <\/script>";

    if(oStringBuilder){
        oStringBuilder.Append(script);
    } else {
        Response.Write(script);
    }

}