/* POP-Up function */
function pop_up(url,w,h){
var left = Math.ceil(screen.width-w)/2;
var top = Math.ceil(screen.height-h)/2;
var rand_name = ""+Math.random();
    rand_name = rand_name.split(".");
window.open(url, rand_name[1], 'toolbar=0,location=0,statusbar=0,menubar=0,resizable=0,width='+w+',height='+h+',left = '+left+',top = '+top+',scrollbars=yes');
}

/* end of pop-up */


function show(id) {
var item = null;
item = document.getElementById(id);
item.style.display = "";
}


function hide(id){
var item = null;
item = document.getElementById(id);
item.style.display = "none";
}