function yg_Browser() {  
  d = document;
  var nav=navigator; this.agt=nav.userAgent.toLowerCase(); this.major = parseInt(nav.appVersion); this.ns=(d.layers); this.dom=(d.getElementById)?1:0; this.ns4up=(this.ns && this.major >=4); this.ns6=(this.agt.indexOf("Netscape6")!=-1); this.op=(window.opera? 1:0); this.ie=(d.all); this.ie5=(d.all&&this.dom); this.fb=(this.agt.indexOf("firebird")!=-1); this.sf=(this.agt.indexOf("safari")!=-1); this.win=((this.agt.indexOf("win")!=-1) || (this.agt.indexOf("16bit")!=-1)); this.mac=(this.agt.indexOf("mac")!=-1); 
}
var oBw = new yg_Browser();
function yg_getW(o) { var w=0; w=(oBw.op)? o.style.pixelWidth:o.offsetWidth; return w; }
function yg_getH(o) { var h=0; h=(oBw.op)? o.style.pixelHeight:o.offsetHeight; return h; }
function yg_getPageX(o) { if (oBw.op) { var x=0; while (eval(o)) { x+=o.offsetLeft; o=o.offsetParent; } return x; } else { var m = (oBw.mac&&oBw.ie) ? document.body.leftMargin : 0; var x=0; while (eval(o)) { x+=o.offsetLeft; o=o.offsetParent; } return parseInt(x)+parseInt(m); } }
function yg_getPageY(o) { if (oBw.ns) { var y=(o.pageY)? o.pageY:o.y; return y; } else if (oBw.op) { var y=0; while (eval(o)) { y+=o.offsetTop; o=o.offsetParent; } return y; } else { var m = (oBw.mac&&oBw.ie) ? document.body.topMargin : 0; var y=0; while(eval(o)) { y+=o.offsetTop; o=o.offsetParent; } return parseInt(y)+parseInt(m); } }
function yg_show(o,disp) { if (disp) o.style.display=disp; o.style.visibility='visible'; }
function yg_hide(o,disp) { if (disp) o.style.display=disp; o.style.visibility='hidden'; }
function yg_addEvt(o,e,f,c) { if (o.addEventListener) o.addEventListener(e,f,c); else if (o.attachEvent) o.attachEvent("on"+e,f); else eval("o.on"+e+"="+f); }
function yg_remEvt(o,e,f) { if (o.removeEventListener) o.removeEventListener(e,f,false); else if (o.detachEvent) o.detachEvent('on'+e,f); }
function yshp_setPageX(o,x) { if(oBw.op) o.style.pixelLeft=x; else o.style.left=x; }
function yshp_setPageY(o,y) { if(oBw.op) o.style.pixelTop=y; else o.style.top=y; }
function yg_setZ(o,z) { if (oBw.ns) o.zIndex=z; else o.style.zIndex=z; }