function menu_on(itid) {
  xx = document.getElementById(itid);
  xx.className = 'item active';
  }
function menu_off(itid) {
  xx = document.getElementById(itid);
  xx.className = 'item';
  }  
function sizeIt(){
	var pool = document.getElementById("pool");
	if(document.all){
	if(pool.offsetHeight<715){
	pool.style.height=715+"px";
	}else pool.style.height = pool.offsetHeight+100+"px";
	}
	else {
	if(pool.offsetHeight<665){
	pool.style.height=665+"px";
	}else pool.style.height = pool.offsetHeight+100+"px";
}  }
function positeIt(){
	var pool = document.getElementById("pool");
	var spodek = document.getElementById("bottom");
	var zebrik = document.getElementById("zebrik");
	if(document.all)
    {
	  spodek.style.width = screen.availWidth-25+ "px";
	//zebrik.style.zIndex=8;
	}else
    {
	  spodek.style.width = screen.availWidth-15+ "px";
	//zebrik.style.zIndex=8;	
	}
	spodek.style.top = pool.offsetHeight-200+"px";
}

function isEmail(obj) {
var reg = /[^ ,.]+[@]+[^ ,.]+[.]+[^ ,.]+/;
var result = obj.value.match(reg);
if (result == null || result[0] != obj.value) {
obj.style.borderColor = 'red';
return false;
} else {
obj.style.borderColor = '';
return true;
}
}

function isString(obj) {
if (obj.value=="") {
obj.style.borderColor = 'red';
return false;
} else {
obj.style.borderColor = '';
return true;
}
}

function validate(form) {
var valid = true;
for(var i = 0; i < form.childNodes.length;i++) {
if (form.childNodes[i].type == "text") {
for(var j = 0; j < form.childNodes[i].attributes.length;j++) {
if (form.childNodes[i].attributes[j].name == "onblur") {
var method = form.childNodes[i].attributes[j].value;
var methodTrueName = method.replace(/this/,"form.childNodes[i]");
eval(methodTrueName);
}
}
}
}
return true;
}