function xmlhttpPost(strURL,qryStr,resArea) { 

    var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {
        if (self.xmlHttpReq.readyState == 4) {
            updatepage(resArea,self.xmlHttpReq.responseText);
        }
    }
    self.xmlHttpReq.send(getquerystring(qryStr));
}

function getquerystring(qryStr) {

	//var f = document.frm.teacherschoolid.options[document.frm.teacherschoolid.selectedIndex].value; 
    var stri = qryStr; 
    qstr = 'w=' + escape(stri);  // NOTE: no '?' before querystring
    return qstr; 
}


function updatepage(resArea,str){
    document.getElementById(resArea).innerHTML = str;
}
        


function checkteacher(form) {
	if(form.teacherid.value=="" || form.teacherid.value==0) {
		alert("Please select a teacher to edit");
		return false;
	}else{
		return true;
	}
}