function xWidth(e,w)
{if(!(e=xGetElementById(e)))return 0;if(xNum(w)){if(w<0)w=0;else w=Math.round(w);}
else w=-1;var css=xDef(e.style);if(e==document||e.tagName.toLowerCase()=='html'||e.tagName.toLowerCase()=='body'){w=xClientWidth();}
else if(css&&xDef(e.offsetWidth)&&xStr(e.style.width)){if(w>=0){var pl=0,pr=0,bl=0,br=0;if(document.compatMode=='CSS1Compat'){var gcs=xGetComputedStyle;pl=gcs(e,'padding-left',1);if(pl!==null){pr=gcs(e,'padding-right',1);bl=gcs(e,'border-left-width',1);br=gcs(e,'border-right-width',1);}
else if(xDef(e.offsetWidth,e.style.width)){e.style.width=w+'px';pl=e.offsetWidth-w;}}
w-=(pl+pr+bl+br);if(isNaN(w)||w<0)return;else e.style.width=w+'px';}
w=e.offsetWidth;}
else if(css&&xDef(e.style.pixelWidth)){if(w>=0)e.style.pixelWidth=w;w=e.style.pixelWidth;}
return w;}