sfHover = function() {
  if(document.getElementById("left_navbar")) {
    var sfEls = document.getElementById("left_navbar").getElementsByTagName("li");
    for (var i=0; i<sfEls.length; i++) {
      sfEls[i].onmouseover=function() {
        this.className+=" sfhover";

        if(document.getElementById("menu_iframe")) {
          var iframe = document.getElementById("menu_iframe");

          var submenu = this.getElementsByTagName("ul");
          if(submenu.length) {
            iframe.style.top = submenu[0].offsetTop + this.offsetTop + 118;
            iframe.style.left = submenu[0].offsetLeft + this.offsetLeft;
            iframe.style.width = submenu[0].scrollWidth;
            iframe.style.height = submenu[0].clientHeight;
            iframe.style.display = "inline";
          }
        }

      }
      sfEls[i].onmouseout=function() {
        this.className=this.className.replace(new RegExp(" sfhover\\b"), "");

        if(document.getElementById("menu_iframe")) {
          var iframe = document.getElementById("menu_iframe");
          iframe.style.display = "none";
        }

      }
    }
  }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function alterForm(method) {
	switch(method) {
		case "recordings":
			document.searchForm.action = 'display_records.php';
			document.searchForm.field.options.length=0;
			document.searchForm.field.options[0] = new Option("Composer (Last Name)", "composerLn", true, false);
			document.searchForm.field.options[1] = new Option("Title", "title", false, false);
			document.searchForm.field.options[2] = new Option("Instrument", "instrument", false, false);
			document.searchForm.field.options[3] = new Option("Length", "length", false, false);
			document.searchForm.field.options[4] = new Option("Style", "style", false, false);
		break;
		case "transcriptions":
			document.searchForm.action = 'display_transcriptions.php';
			document.searchForm.field.options.length=0;
			document.searchForm.field.options[0] = new Option("Composer (Last Name)", "composerLn", true, false);
			document.searchForm.field.options[1] = new Option("Title", "title", false, false);
		break;
	}
	
}

function txtToSelect() {
	var boxChange = document.getElementById("searchBox");
	if (document.searchForm.field.value == "length") {
		boxChange.innerHTML = "<select name=\"searchTerms\">\n<option value=\"25\">25%\n<option value=\"50\">50%\n<option value=\"100\">100%\n</select>\n";
	}
	
	else {
		boxChange.innerHTML = "<input type=\"text\" name=\"searchTerms\" maxlength=\"255\">";
	}

}


function alterBonus(bonusInfo) {
	var bonusChange = document.getElementById("bonusInfo");
	if (document.info.format.value == "MIDI") {
		// hide div
		bonusChange.style.visibility = "hidden";
		// clear form values
		for (var i = 0; i < document.info.elements.length; i++) {
			if (document.info.elements[i].type == 'text') {
				document.info.elements[i].value = "";				
			}
		}
		
	}
	else {
		bonusChange.style.visibility = "visible";
	}
}

function clearIt(pageItem) {
	eval("document." + pageItem + ".value=''");
}