// In The Name of Allah, The Most Gracious, The Most Merciful
function xDef(){for(var i=0;i<arguments.length;++i){if(typeof(arguments[i])=='undefined')return false;}return true;}
function xGetElementById(e){if(typeof(e)=='string'){if(document.getElementById)e=document.getElementById(e);else if(document.all)e=document.all[e];else e=null;}return e;}
function xGetElementsByTagName(t,p){var list=null;t=t||'*';p=p||document;if(typeof p.getElementsByTagName!='undefined'){list=p.getElementsByTagName(t);if(t=='*'&&(!list||!list.length))list=p.all;}else{if(t=='*')list=p.all;else if(p.all&&p.all.tags)list=p.all.tags(t);}return list||new Array();}
function xVisibility(e,bShow){if(!(e=xGetElementById(e)))return null;if(e.style&&xDef(e.style.visibility)){if(xDef(bShow))e.style.visibility=bShow?'visible':'hidden';return e.style.visibility;}return null;}

function xParent(e,bNode){if(!(e=xGetElementById(e)))return null;var p=null;if(!bNode&&xDef(e.offsetParent))p=e.offsetParent;else if(xDef(e.parentNode))p=e.parentNode;else if(xDef(e.parentElement))p=e.parentElement;return p;}