function getposOffset(_1,_2){var _3=(_2=="left")?_1.offsetLeft:_1.offsetTop;var _4=_1.offsetParent;while(_4!=null){_3=(_2=="left")?_3+_4.offsetLeft:_3+_4.offsetTop;_4=_4.offsetParent;}return _3;}function overlay(_5,_6,_7){if(document.getElementById){var _8=document.getElementById(_6);_8.style.display=(_8.style.display!="block")?"block":"none";var _9=getposOffset(_5,"left")+((typeof _7!="undefined"&&_7.indexOf("right")!=-1)?-(_8.offsetWidth-_5.offsetWidth):0);var _a=getposOffset(_5,"top")+((typeof _7!="undefined"&&_7.indexOf("bottom")!=-1)?_5.offsetHeight:0);_8.style.left=_9+"px";_8.style.top=_a+"px";return false;}else{return true;}}function overlayclose(_b){document.getElementById(_b).style.display="none";}