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function inject_code(str)
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function omnitureClick(str)
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function bubble(options)
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if(typeof options.style!='undefined')
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if(typeof options.direction!='undefined')
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if(typeof options.align!='undefined')
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this.show();}
bubble.prototype.show=function()
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bubble.prototype.addDiv=function(x,y,width,height,text)
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{my.timeout=setTimeout(function()
{my.remove();},500);});$(tempDiv).mouseover(function(e)
{clearTimeout(my.timeout);});$(tempDiv).mouseout(function(e)
{if(e.relatedTarget&&(e.relatedTarget!=this)&&(e.relatedTarget.parentNode!=this))
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else
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if(this.bubble1)
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if(this.bubble2)
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$(document).ready(function()
{});function getCookie(name)
{var start=document.cookie.indexOf(name+"=");var len=start+name.length+1;if((!start)&&(name!=document.cookie.substring(0,name.length))){return null;}
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function setCookie(name,value,expires,path,domain,secure)
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var expires_date=new Date(today.getTime()+(expires));document.cookie=name+"="+escape(value)+
((expires)?";expires="+expires_date.toGMTString():"")+
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((domain)?";domain="+domain:"")+
((secure)?";secure":"");}
function deleteCookie(name,path,domain)
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((path)?";path="+path:"")+
((domain)?";domain="+domain:"")+";expires=Thu, 01-Jan-1970 00:00:01 GMT";}
function getHSWCookie()
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function createRequestObject()
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return ro;}
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{var refcookie=getCookie('HSWPartner');if(refcookie!=""&&refcookie!=null&&refcookie!=undefined)
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var partner=getPartner(ref);if(partner==""||partner==undefined||partner==null)
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function getPartner(ref)
{if(ref.indexOf('www.forbestraveler.com')>=0)
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function handleResponse()
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function embedVideo(videofile)
{var msg='<iframe src="http://videos.howstuffworks.com/vid_inpage.php?pageID='+videofile+'" name="vidFrame" frameborder=0 width=420 hscroll=no vscroll=no height=410>Your Browser Does Not Support iFrames</iframe>';document.write(msg);}
function embedVideoSmall(videofile)
{var msg='<iframe src="http://videos.howstuffworks.com/vid_inpage_s.php?pageID='+videofile+'" name="vidFrame" frameborder=0 width=225 hscroll=no vscroll=no height=195>Your Browser Does Not Support iFrames</iframe>';document.write(msg);}
function embedVideoPlain(videofile)
{var msg='<iframe src="http://videos.howstuffworks.com/vid_inpage_plain.php?pageID='+videofile+'" name="vidFrame" frameborder="0" width="420" hscroll="no" vscroll="no" height="410">Your Browser Does Not Support iFrames</iframe>';document.write(msg);}
function embedVideo280(videofile)
{var msg='<iframe src="http://videos.howstuffworks.com/vid_inpage_280.php?pageID='+videofile+'" name="vidFrame" frameborder=0 width=290 hscroll=no vscroll=no height=300>Your Browser Does Not Support iFrames</iframe>';document.write(msg);}
function inPagePlayer(videoId,args)
{args=args?args:{};var url='http://videos.howstuffworks.com/inline-player.htm';var winWidth=460;var winHeight=496;var noSkin=0;options=new Array;options.push('videoId='+videoId);options.push('adCode='+escape(typeof OAS_sitepage==='string'?OAS_sitepage:''));if(args.noSkin)
{options.push('noSkin='+(args.noSkin?noSkin=1:0));}
if(args.width!=null)
{options.push('width='+args.width);if(noSkin)
{winWidth=args.width;}}
if(args.height)
{options.push('height='+args.height);if(noSkin)
{winHeight=args.height;}}
if(args.autostart)
{options.push('autostart='+(args.autostart?1:0));}
var msg='<br><iframe  style="clear: both;"  src="'+url+'?'+options.join('&')+'" name="vidFrame" frameborder="0" width="'+winWidth+'" hscroll="no" vscroll="no" scrolling="no" height="'+winHeight+'">'
+'Your Browser Does Not Support iFrames'
+'</iframe>';document.write(msg);}
function inject_code(str){document.write(str);}
function browserAcceptsCookies()
{var HSW_acceptsCookies=false;if(document.cookie=='')
{document.cookie='HSW_acceptsCookies=yes';if(document.cookie.indexOf('HSW_acceptsCookies=yes')!=-1)
{HSW_acceptsCookies=true;}}
else
{HSW_acceptsCookies=true;}
return(HSW_acceptsCookies);}
function recordStats(webpage,referer)
{}
function tsStats(parms)
{var _bs='<img height=1 width=1 border=0 src="http://www.howstuffworks.com/tsform.php?'+parms+'">';document.write(_bs);}
function OpenWindow(url)
{newwindow=window.open("/"+url,'HowStuffWorks','status=no,toolbar=no,location=no,menubar=no,scrollbars=yes,resizable=yes,width=485,height=675');}
function OpenWindow2(url,h,w)
{newwindow=window.open("/"+url,'HowStuffWorks','status=no,toolbar=no,location=no,menubar=no,scrollbars=no,resizable=no,width='+w+',height='+h);}
var RN=new String(Math.random());var RNS=RN.substring(2,11);function DisplayAds(sitepage,position,width,height)
{var oas='http://ad.howstuffworks.com/RealMedia/ads/';var oaspage=sitepage+'/1'+RNS+'@'+position;if(_version<11)
{document.write('<A HREF="'+oas+'click_nx.ads/'+oaspage+'" TARGET="_top"><IMG SRC="'+oas+'adstream_nx.ads/'+oaspage+'" BORDER="0" WIDTH="'+width+'" HEIGHT="'+height+'"></a>');}
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{document.write('<SCRIPT LANGUAGE="JavaScript1.1" SRC="'+oas+'adstream_jx.ads/'+oaspage+'">');document.write('\<\!-- --\>');document.write('\<\/SCRIPT\>');document.write('\<\!-- --\>');}}
function showImage(html)
{windowOps="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,"+"width=500,height=500,left=250,top=50";ImageWindow=window.open("","ImageWindow",windowOps);windowHTML='<html><body><base href="http://www.howstuffworks.com/"><center><font face="arial,helvetica">'+html+'<p><font face="arial,helvetica">'+'<a href="javascript:window.close();">Click here</a> to close this window.</font></center>'+'</body></html>';self.ImageWindow.document.clear();self.ImageWindow.document.write(windowHTML);self.ImageWindow.focus();self.ImageWindow.document.close();}
function tryIt(HTML)
{windowOps="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,"+"width=500,height=500,left=250,top=50";ImageWindow=window.open("","ImageWindow",windowOps);windowHTML='<html><body>'+HTML+'<p><font face="arial,helvetica">'+'<A HREF="javascript:window.close();">Click here</a> to close this window.</font>'+'</body></html>';self.ImageWindow.document.clear();self.ImageWindow.document.write(windowHTML);self.ImageWindow.focus();self.ImageWindow.document.close();}
function shopTI(url,lid)
{if(url.indexOf("LINKIN_ID")==-1)
{url="http://"+escape(url.substring(7))+"/LINKIN_ID-"+lid;}
return url;}
function videoWin(id)
{window.open('mediacenter/mcPlayerFull.php?vidID='+id,'mcPlayer','width=740,height=440,menubar=no,status=no,location=no,toolbar=no,scrollbars=yes,resizable=yes');}
function D_findPosX(obj)
{var curleft=0;if(obj.offsetParent)
{while(obj.offsetParent)
{curleft+=obj.offsetLeft
obj=obj.offsetParent;}}
else if(obj.x)
{curleft+=obj.x;}
return curleft;}
function D_findPosY(obj)
{var curtop=0;if(obj.offsetParent)
{while(obj.offsetParent)
{curtop+=obj.offsetTop
obj=obj.offsetParent;}}
else if(obj.y)
{curtop+=obj.y;}
return curtop;}
function revealDiv(divID,parentID)
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revealDiv.prototype.show=function()
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revealDiv.prototype.hide=function(divID)
{element=this._element;this._timeout=setTimeout(function()
{element.style.visibility='hidden';},500);}
revealDiv.prototype._clear=function()
{if(this._timeout==0)
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{$('#inlinePlayerAds').html('');this._documentWrite=document.write;document.write=function(string)
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if(string.match(/^<\/script/))
{eval(hswVideoOverlay._bufferContent);hswVideoOverlay._bufferStatus=false;hswVideoOverlay._bufferContent='';return;}
if(hswVideoOverlay._bufferStatus)
{hswVideoOverlay._bufferContent+=string;return;}
$('#inlinePlayerAds').append(string);}
$('#inlinePlayerAds').append(this.getAdString("x58,x59!x58","400","75")+
this.getAdString("x58,x59!x59","150","700"));},getAdString:function(position,width,height)
{var oas=OAS_url;var oaspage=OAS_sitepage+'/1'+this.getRandomNumber()+'@'+position;var adString='';if(OAS_version<11)
{adString+='<A HREF="'+oas+'click_nx.ads/'+oaspage+'" TARGET="_top"><IMG SRC="'+oas+'adstream_nx.ads/'+oaspage+'" BORDER="0" WIDTH="'+width+'" HEIGHT="'+height+'"></a>';}
else
{adString+='<SCRIPT LANGUAGE="JavaScript1.1" SRC="'+oas+'adstream_jx.ads/'+oaspage+'">';adString+='\<\!-- --\>';adString+='\<\/SCRIPT\>';adString+='\<\!-- --\>';}
return adString;},getRandomNumber:function()
{if(this._randomNumber==null)
{var rn=new String(Math.random());this._randomNumber=rn.substring(2,11);}
return this._randomNumber;}}
var realMediaPM={_cssRules:(document.all?'rules':'cssRules'),_classChange:new Array(),changeColor:function(color)
{adBackgroundColor=color;},setColor:function(color)
{document.body.style.background=color;for(i in this._classChange)
{for(var S=0;S<document.styleSheets.length;++S)
{for(var R=0;R<document.styleSheets[S][this._cssRules].length;R++)
{if(document.styleSheets[S][this._cssRules][R].selectorText==this._classChange[i])
{document.styleSheets[S][this._cssRules][R].style['background']=color;}}}}},changeVideoOverlayBackground:function(url)
{$(document).ready(function(){$.fn.hswModal._defaultOptions.backgroundImage="url('"+url+"')";$.fn.hswModal._args.backgroundImage="url('"+url+"')";$.fn.hswModal.changeModalBg({backgroundImage:"url('"+url+"')"});});},changeVideoOverlayTransparency:function(transparency)
{$(document).ready(function(){$.fn.hswModal._defaultOptions.opacity=transparency;$.fn.hswModal._args.opacity=transparency;$.fn.hswModal.changeModalBg({opacity:transparency});});}}
function makeHomePage(domain)
{var obj=document.getElementById("hplink");if(!domain)
{domain="http://www.howstuffworks.com/";}
if(window.sidebar)
{window.sidebar.addPanel('HowStuffWorks',domain,"");}
else
{if(navigator.appName=="Microsoft Internet Explorer"&&(parseInt(navigator.appVersion)>=4))
{obj.style.behavior="url(#default#homepage)";obj.setHomePage(domain);}
else
{sethp=window.open("/sethomepage.php","sethp","toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,width=500,height=300,alwaysRaised=yes,screenX=250,screenY=250,top=250,left=250,alwaysRaised=yes");}}}
function swapHealthBox(display)
{switch(display)
{case"symptom":document.getElementById("diseases").style.visibility="hidden";document.getElementById(display).style.visibility="visible";break;case"diseases":document.getElementById("symptom").style.visibility="hidden";document.getElementById(display).style.visibility="visible";break;}}
function onFSCommand()
{}