function kontrola() {
	informace=document.uprav.informace.value;
	email=document.uprav.email.value;

	if (informace == ""){
			alert("Vyplňte svůj dotaz");
			return false;
	}
	if ((email == "") || (email.indexOf("@")<1)){
			alert("Email musí být vyplněn");
    document.uprav.email.focus();
    document.uprav.email.select();
			return false;
	}
} 
function nahledref(aaa, bbb) {
prewiev2 = window.open('reference/'+aaa+'.html?'+bbb,'nahledy','toolbar=no,status=no,scrollbars=no,location=no,menubar=no,directories=no,width=550,height=396,left=20,top=10');
prewiev2.window.focus();
}

function pdf(aaa) {
	prewiev2 = window.open('refer/'+aaa,'pdf','toolbar=no,status=no,scrollbars=yes,location=no,menubar=no,directories=no,resizable=1,width=600,height=600,left=10,top=10');
	prewiev2.window.focus();
}

function pdf2(aaa) {
	prewiev2 = window.open('certif/'+aaa,'pdf','toolbar=no,status=no,scrollbars=yes,location=no,menubar=no,directories=no,resizable=1,width=600,height=600,left=10,top=10');
	prewiev2.window.focus();
}

function pdf3(aaa) {
	prewiev2 = window.open('sponzor/'+aaa,'pdf','toolbar=no,status=no,scrollbars=yes,location=no,menubar=no,directories=no,resizable=1,width=600,height=600,left=10,top=10');
	prewiev2.window.focus();
}