function display(id){
    //alert(id);
    if(document.getElementById(id).style.display=='none'){
        document.getElementById(id).style.display = 'block';
        document.getElementById("img"+id).src = 'img/expanded.gif';
    }
    else{
        document.getElementById(id).style.display = 'none';
        document.getElementById("img"+id).src = 'img/collapsed.gif';
    }
}

function delsms(){
    return window.confirm('Chcete tuto SMS opravdu vymazat?');
}

function setCheck(cl,ch){
    els = getElementsByClassName(document,cl,"input");
    for (var i = 0; i < els.length; i++){
        els[i].checked = ch;
	}
}

function getChecked(cl){
    var pocet = 0;
    els = getElementsByClassName(document,cl,"input");
    for (var i = 0; i < els.length; i++){
        if(els[i].checked)
            pocet++;
	}
    return pocet;
}
function delSel(){
    return window.confirm('Checete opravdu smazat '+getChecked('chs')+' záznamů?');
}
function setSel(tr,ch){
    if(document.getElementById(ch).checked){
        document.getElementById(ch).checked=0;
    }
    else{
        document.getElementById(ch).checked=1;
    }
}
//funkce vyuzivajici dom.js
function getElementsByClassName(srcElm, clName, tName) {
		foundElements = [];
		tName = (tName) ? tName.toUpperCase() : "*";
		allElements = srcElm.getElementsByTagName(tName);
		for (var i = 0; i < allElements.length; i++) {
			if (cls.has(allElements[i], clName)) {
				foundElements[foundElements.length] = allElements[i];
			}
		}
		return foundElements;
}