function Captcha(){this.ajaxRequest=null;this.imageWidth=0;this.imageHeight=0;this.zoomIcon;this.src='index.php?page=Captcha';this.init=function(){var image=document.getElementById('captchaImage');if(image){var p=document.createElement('p');image.parentNode.appendChild(p);var a=document.createElement('a');a.onclick=function(){captcha.reload();};p.appendChild(a);var title=document.createTextNode(captchaLanguage['wcf.captcha.reload']);a.appendChild(title);image.onload=function(){captcha.initImageResizer();};}}
this.initImageResizer=function(){var image=document.getElementById('captchaImage');if(image){this.imageWidth=image.width;this.imageHeight=image.height;if(this.imageWidth>0&&this.imageHeight>0){image.style.cursor='pointer';this.zoomIcon=document.createElement('img');image.parentNode.insertBefore(this.zoomIcon,image.nextSibling);this.zoomIcon.style.display='none';this.zoomIcon.style.cursor='pointer';this.zoomIcon.style.verticalAlign='top';this.zoomIcon.style.marginLeft='-20px';this.zoomIcon.style.paddingTop='4px';image.onmouseover=function(){captcha.zoomIcon.style.display='';};this.zoomIcon.onmouseover=image.onmouseover;image.onmouseout=function(){captcha.zoomIcon.style.display='none';};this.minimize();}}}
this.minimize=function(){var image=document.getElementById('captchaImage');if(image){image.width=Math.round(this.imageWidth/2);image.height=Math.round(this.imageHeight/2);image.onclick=function(){captcha.maximize();};this.zoomIcon.src=RELATIVE_WCF_DIR+'icon/zoomInS.png';image.title=captchaLanguage['wcf.captcha.maximize'];this.zoomIcon.title=captchaLanguage['wcf.captcha.maximize'];}}
this.maximize=function(){var image=$('captchaImage');if(image){image.up().insert('<div id="captchaHelper"></div>');var captchaHelper=$('captchaHelper');if(captchaHelper.getWidth()<this.imageWidth){image.width=captchaHelper.getWidth();image.height=this.imageHeight*(captchaHelper.getWidth()/this.imageWidth);captchaHelper.remove();}
else{image.width=this.imageWidth;image.height=this.imageHeight;}
image.onclick=function(){captcha.minimize();};this.zoomIcon.src=RELATIVE_WCF_DIR+'icon/zoomOutS.png';image.title=captchaLanguage['wcf.captcha.minimize'];this.zoomIcon.title=captchaLanguage['wcf.captcha.minimize'];}}
this.reload=function(){if(this.ajaxRequest==null){var date=new Date();this.ajaxRequest=new AjaxRequest();this.ajaxRequest.openGet(this.src+'&action=newCaptchaID&t='+date.getTime()+SID_ARG_2ND,function(){captcha.receiveResponse()});}}
this.receiveResponse=function(){if(this.ajaxRequest&&this.ajaxRequest.xmlHttpRequest.readyState==4&&this.ajaxRequest.xmlHttpRequest.status==200&&this.ajaxRequest.xmlHttpRequest.responseXML){var captchaID=0;var tags=this.ajaxRequest.xmlHttpRequest.responseXML.getElementsByTagName('captchaid');if(tags.length>0){captchaID=tags[0].childNodes[0].nodeValue;}
this.ajaxRequest.xmlHttpRequest.abort();this.ajaxRequest=null;var hidden=document.getElementById('captchaID');if(hidden){hidden.value=captchaID;}
var image=document.getElementById('captchaImage');if(image){image.onload=function(){};image.src=this.src+'&captchaID='+captchaID+SID_ARG_2ND;}}}
this.init();}
var captcha=new Captcha();