function checkSongNumber() {
                  var snum=document.form1.nigunId.value;
        if (snum == null || snum =="") {
              alert("Valid numbers: 1 - 560")
              return false; 
              } else {
	  snum=snum.toLowerCase();
        if (snum=="175a"||snum=="175b"||snum=="262a"||snum=="498a"||snum=="525a") {
              return true;
              } else {
        inputStr=snum.toString()
        for (var i=0;i<inputStr.length;i++) {
              var oneChar=inputStr.charAt(i)
              if (oneChar<"0"||oneChar>"9") {
              alert("Valid numbers: 1 - 560")
                   return false;
                   }
              }}}
        if (snum>560 || snum<1) {
              alert("Valid numbers: 1 - 560")
              return false;
              } else {
              return true;
              }
}

function changePage(theform) {
var num= theform.select.selectedIndex;
var pg= theform.select.value;
var passedValue;
if (num==0) {return false;}
if (num==1) { passedValue = "Dovid_Hurwitz"; }
if (num==2) { passedValue = "Efraim_Rosenblum"; }
if (num==3) { passedValue = "Laibel_Volovik"; }
location.href="nigunSearch2.asp?balMenagen="+passedValue+"&pg="+pg;
}