// JavaScript Document

// biura - zmiana rzutu pietra
function pokaz_img1(co,nr) {
	document.getElementById(co+'1').style.display = 'none';
	document.getElementById(co+'2').style.display = 'none';
	document.getElementById(co+'3').style.display = 'none';
	document.getElementById(co+nr).style.display = 'inline';
}
function pokaz_img2(co,nr) {
	document.getElementById(co+'4').style.display = 'none';
	document.getElementById(co+'5').style.display = 'none';
	document.getElementById(co+'6').style.display = 'none';
	document.getElementById(co+nr).style.display = 'inline';
}
function pokaz_img3(co,nr) {
	document.getElementById(co+'7').style.display = 'none';
	document.getElementById(co+'8').style.display = 'none';
	document.getElementById(co+'9').style.display = 'none';
	document.getElementById(co+nr).style.display = 'inline';
}
function pokaz_img4(co,nr) {
	document.getElementById(co+'10').style.display = 'none';
	document.getElementById(co+'11').style.display = 'none';
	document.getElementById(co+'12').style.display = 'none';
	document.getElementById(co+nr).style.display = 'inline';
}
function pokaz_img5(co,nr) {
	document.getElementById(co+'13').style.display = 'none';
	document.getElementById(co+'14').style.display = 'none';
	document.getElementById(co+'15').style.display = 'none';
	document.getElementById(co+nr).style.display = 'inline';
}

// popup
function popup(url, width, height) {
	var left = screen.width/2 - width/2; var top = screen.height/2 - height/2;
	window.open(url,null,"width="+width+",height="+height+",top="+top+",left="+left+",hstatus=no,scrollbars=no,toolbar=no");
}


// formularz
function isEmpty(val) {
        if (val.match(/^s+$/) || val == "") return true;
        else return false;
}

function isEmailAddress(val) {
        if (val.match(/^([a-zA-Z0-9])+([.a-zA-Z0-9_-])*@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-]+)+/)) return true;
        else return false;
}

function isAlpha(val) {
        if (val.match(/^[a-zA-Z\. ]+$/)) return true;
        else return false;
}

function chkLen(obj, len) {
        eval("s = new String(document.step1."+obj+".value)");
        if (s.length <= len) return true;
        else { eval("alert('Maximum length of this field is "+len+" characters.')"); return false; }
}