function xHeight(e,h)
{if(!(e=xGetElementById(e)))return 0;if(xNum(h)){if(h<0)h=0;else h=Math.round(h);}
else h=-1;var css=xDef(e.style);if(e==document||e.tagName.toLowerCase()=='html'||e.tagName.toLowerCase()=='body'){h=xClientHeight();}
else if(css&&xDef(e.offsetHeight)&&xStr(e.style.height)){if(h>=0){var pt=0,pb=0,bt=0,bb=0;if(document.compatMode=='CSS1Compat'){var gcs=xGetComputedStyle;pt=gcs(e,'padding-top',1);if(pt!==null){pb=gcs(e,'padding-bottom',1);bt=gcs(e,'border-top-width',1);bb=gcs(e,'border-bottom-width',1);}
else if(xDef(e.offsetHeight,e.style.height)){e.style.height=h+'px';pt=e.offsetHeight-h;}}
h-=(pt+pb+bt+bb);if(isNaN(h)||h<0)return;else e.style.height=h+'px';}
h=e.offsetHeight;}
else if(css&&xDef(e.style.pixelHeight)){if(h>=0)e.style.pixelHeight=h;h=e.style.pixelHeight;}
return h;}